Source Water Assessment Report

Source Water Assessment Report for Oregon City - South Forl( Water Board PWS #4100591 North Clacl(amas County Water Commission PWS #4100580 and Clacl(amas River Water PWS #4100187

January 9, 2003

Prepared for South Fork Water Board North Clackamas County Clackamas River Water Water Commission Oregon City,Oregon Milwaukie, Oregon Clackamas, Oregon

Prepared by � � )fDHS 1•1:(•1 · f)n1gon r1!�p;ntmc>nt State of Oregon of Hum(ln 51'rvicc5 Departmentof Environmental Quality Drinking Water Program Water Quality Division Drinking Water Protection Program Department of Environmental Quality regon 811 SW Sixth Avenue Jolu1 A. Kitzhaber, 11.D., Governor Portland, OR 97204-1390 (503) 229-5696 TTY (503) 229-6993 January 9, 2003

Gordon McGhee Clackamas River Water PO Box 2439 Clackamas, OR 97015

Bruce Hemenway, Water Quality/Safety Compliance South Fork 'Nater Board 15962 S. Hunter Ave. Oregon City, OR 97045

Kathy Willis, Water Resources Manager North Clackamas Co. Water Commission 14496 SE River Road Milwaukie, OR 97267

RE: Source Water Assessment Rep01i Oregon City - South Fork Water Board, PWS #4100591 North Clackamas County Water Commission, PWS #4100580 and Clackamas River Water, PWS #4100187

Dear Gordon, Bruce and Kathy:

Enclosed is the Source Water Assessment Report for Oregon City- South Fork Water Board (O C-SFWB), North Clackamas County Water Commission (NCCWC), and Clackamas River Water's (CRW) drinking water protection area. The assessment was prepared under the requirements and guidance of the Federal Safe Drinking Water Act and the US Environmental Protection Agency, as well as a detailed Source ·water Assessment Plan developed by a statewide citizen's advisory committee here in Oregon. The Department of Environmental Quality (DEQ) and the Oregon Department of Human Services (DHS) are conducting the assessments for all public water systems in Oregon. The purpose is to provide information so that the public water system staf£'operator, consumers, and community citizens can begin developing strategies to protect your sources of drinking water.

In addition to the intakes for OC-SFWB, NCCWC, and CRW, there are intakes for three other water providers in the Clackamas River watershed; a schematic diagram of the Clackamas Sub basin Drinking Water Protection Areas is attached. This assessment addresses the geographic area providing water to your intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection area) between the OC-SFWB intake and the upstream intake for Estacada. Information on OC-SFWB, NCCWC, and CR W's protection area upstream of the Estacada

DEQ-1 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water January 9, 2003 Page 2

intake (including the area upstream of the USFS Timberlake JCC's intake) is presented in the Source Water Assessment for those public water systems and is summarized in this report.

Since the drinking water intake for Lake Oswego Municipal Water is located on the Clackamas River downstream of OC-SFWB's intake, activities and impacts in the OC-SFWB, NCCWC, and CRW protection area have the potential to also impact this downstream user. The delineated drinking water protection area for areas upstream of OC-SFWB's intake are also included in the drinking water protection area for Lake Oswego, therefore they will be provided with copies of your report as well. We encourage all of the communities using the Clackamas River to work together in developing a protection plan or strategy.

As you know, the 1996 Amendments to the Safe Drinking Water Act requires Consumer ConfidenceReports (CCR) by community water systems. CCRs include information about the quality of the drinking water, the source of the drinking water, and a summary of the source water assessment. Public water systems are responsible for notifying their customers of the assessment results. The information from this assessment can be presented by distributing the "Summary Brochure" attached to the report. There is a blank space to insert instrnctions for how customers can obtain or review a copy of your source water assessment report. Distribution of any copies of the report must be done at the local level. At a minimum, we would suggest that a copy be placed at the local library, city hall, and/or public water supply office and your customers can review the report at their convenience. By mid-2003, all results of these assessments will also be made available electronically to the public on DEQ's and DHS's websites.

The identification of potential contaminant sources was conducted by staff and volunteers from the Clackamas Basin Watershed Council in accordance with Oregon Source Water Assessment Plan methods. We thank you for your significant efforts in coordinating volunteers and staff, conducting the field surveys, and entering the data for over 1,000 potential sources of contamination within your watershed. The large amount of detail on the potential risks within the watershed that you provided will be a key part of protection planning for your drinking water supply. ·

We also commend the OC-SFWB, NCCWC, and CRW for your existing commitment to enhance and protect the quality of the Clackamas River watershed and your participation in the ongoing Clackamas River Basin Council group. As you know, there are no regulatory requirements for you to develop a drinking water protection plan using these assessment results, but we hope your community will continue to participate voluntarily in watershed protection efforts. One of the specific goals of developing a "Drinking Water Protection Plan" is to address the facilities and land use activities that pose high or moderate risks for contaminating your public water supply. At a minimum, we recommend that the community seek ways to Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water January 9, 2003 Page 3

communicate and extend outreach to these facilities/activities (both within and outside your jurisdiction) with education and technical assistance to minimize the risk of contamination to the drinking water intakes. We can provide limited assistance to the CRBC group or watershed council in the group proceeds with drinking water protection implementation.

We have enclosed two copies of the large GIS map of the watershed and the assessment results in the report (Figure 4). If you have a need for additional copies of the large map, we must charge a small fee for each to cover the costs that were not budgeted by the program. In addition, most of the information is available in an electronic format.

If you have any questions or need more infonnation, please do not hesitate to call me at 503-229- 5664 or Sheree Stewart at 503-229-5413.

Sincerely, r��6% Julie K. Harvey, R.G. Drinking Water Protection Specialist Water Quality Division

Enclosures cc: Michael Carlson, Coordinator, Clackamas River Basin Council Clackamas Subbasin Drinking Water Protection Areas

J+f Drinking Water Protection Area e Drinking Water Intake - Surface Water

Watersheds are delineated intake-to-intake: For watersheds with more than one intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next intake upstream. All protection areas upstream of the water system's intake are included in the drinking water protection area (DWPA). We encourage water systems located in the same basin to work together during protection planning.

Kiiometer.

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I!lll] 0~ 10 -·- �lOI IVD! owmber, =- Printed � 2002 Oregon Department of Environmental Quality GIS Table of Contents

Executive Summaty...... l Introduction...... 3 Background...... 4 Delineation of the Protection Area Methodology...... 5 Results...... 6 Identification of Sensitive Areas Methodology...... 8 Results...... 10 Inventory of Potential Contaminant Sources Methodology...... 11 Results...... 13 Susceptibility Analysis Methodology...... 14 Results...... 15 Summary and Recommendations...... 16

Developing a Drinking Water Protection Plan...... 19

References...... 22

Figures Figure I. Clackamas Sub-Basin Drinking Water Protection Areas Figure 2. OC-SFWB, NCCWC, and CRW Portion of the Clackamas Sub-Basin Drinking Water Protection Area Figure 3. Sensitive Areas within the OC-SFWB, NCCWC, and CRW Drinking Water Protection Area Figure 4. Source Water Assessment Results (in pocket) OC-SFWB, NCCWC, and CRW Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources

Tables Tabk I. Summary of Potential Contaminant Sources by Land Use Table 2. Possible Water Quality Impacts from Potential Contaminant Sources Table 3. Inventory Results- List of Potential Contaminant Sources Table 4. Spatial Coordinates of Potential Contaminant Sources

Attachments Attachment A. Source Water Assessment Summary Brochure Attachment B. Summary of Source Water Assessment Results forUpstream Intakes and Schematic of Clackamas Sub-Basin Drinking Water Protection Areas

Oregon Source Water Asscssn1ent Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water-PWS # 4100591, 4100580, and 4100187 I \ \ \ \ \ \ \ \ \ \ I \ I \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Executive Summary The drinking water for Oregon City - South Fork Water Board (OC-SFWB), North Clackamas County Water Commission (NCCWC), and Clackamas River Water (CRW) is supplied by three individual intakes on the Clackamas River. These three public water suppliers teamed with Department of Environmental Quality (DEQ) and the Department of Human Services (DHS) to complete this Source Water Assessment for the Clackamas River watershed upstream of the intakes. Combined, the three public water systems serve approximately 90,000 citizens.

In addition to the intakes for OC-SFWB, NCCWC, and CRW, there are intakes for three other water providers in the Clackamas River watershed : the intake for Lake Oswego Municipal Water is located downsh·eam and the intakes for the City of Estacada and the US Forest Service (USFS) Timberlake Job Corps Center are located upsh·eam. For watersheds with more than one drinking water intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next intake upstream. The SFWB, NCCWC, and CRW water systems agreed to collaborate and conduct one watershed assessment for the area upsh·eam of their intakes. This assessment addresses the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection area) between the OC-SFWB intake and the upstream intake for Estacada. Information on OC-SFWB, NCCWC, and CRW' s protection area upstream of the Estacada intake (including the area upstream of the USFS Timberlake JCC's intake) is presented in the Source Water Assessment forthose public water systems and is summarized in this report.

The OC-SFWB, NCCWC, and CRW intakes are located in the Lower Clackamas River Watershed in the Clackamas Sub-Basin of the Willamette Basin. The geographic area providing water to OC-SFWB, NCCWC, and CRW intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection area) extends upstream from the OC-SFWB intake approximately 335 miles (approximately 1, 130 miles including area upstream of the Estacada intake) in a southeasterly direction and encompasses a total area of 264 square miles (939 total square miles including the area upstream of the Estacada intake). Included in this area are a number of tributaries to the Clackamas River including Rock, Richardson, Clear, Eagle, Deep, Foster, and Goose Creeks and their tributaries. The intakes are located at an approximate elevation of 30 to 40 feet and the upper edge of the watershed is located at an elevation of approximately 7 ,200 feet at Ollalie Butte.

The protection area within an 8-hour travel time from the intake extends approximately 14.3 miles upstream of the OC-SFWB intake. It is recommended that the water systems and community consider increased protection within an 8-hour travel time fromthe intake since eight hours should provide adequate response time to protect the integrity of the public water system intake should a spill or release occur at any crossing or discharge point to the stream. An inventory of potential contamination sources was performedwithin OC-SFWB, NCCWC, and CRW's drinking water protection area. The primary intent of this inventory was to identify and locate significantpotential sources of contaminants of concern. The inventory was conducted by reviewing applicable state and federal regulatory databases and land use maps,

Oregon Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 interviewing persons knowledgeable of the area, and conducting a windshield survey by driving through the drinking water protection area to fieldlocate and verify as many of the potential contaminant source activities as possible. The primary contaminants of concern for surface water intakes are sediments/turbidity, microbiological, and nutrients. It is important to remember that the sites and areas identified are only po tential sources of contamination to the drinking water. Water quality impacts are not likely to occur when contaminants are used and managed properly and land use activities occur in such a way as to minimize erosion and contaminant releases.

The delineated drinking water protection area is occupied by multiple land uses. The "inventory" of potential sources of contamination was conducted by using the standard procedures and list developed by the statewide adviso1y committee and is consistent with what has been used throughout the state for the assessments. In this assessment process, a total of 1,127 potential contamination sources were identifiedwithin OC-SFWB, NCCWC, and CR W's portion of the drinking water protection area. An additional 51 potential sources of contamination were identifiedups h·e am of the Estacada intake. Of the sources identified in the OC-SFWB, NCCWC, and CRW's portion of the protection area, 533 are located in the sensitive areas. There are an additional 199 sites where the location and sensitivity was not identified during the inventory.

Potential contaminant sources identifiedin the watershed that relate to agricultural/forest management include irrigated and non-irrigated crop areas, managed forestla nds, animal grazing areas, boarding stables, confined animal feeding operations, farm machinery repair shops, and chemical mixing/storage/handling areas. Potential contaminant sources related to commercial and industrial land uses include parking lots/malls, fleet/trucking terminals, gas stations, body/repair shops, chemical processing/storage facilities, food processing facilities, junk/scrap/salvage yards, machine shops, metal plating/finishing/fabricationshops, wood/pulp/paper processing facilities, and other manufacturing land uses. The potential contaminant sources identifiedin the watershed that relate to residential/municipalities include high density housing areas, a landfill, rural homesteads with septic systems, campgrounds, parks, golf courses, waste transfer/recycling stations, utility stations, and wastewater treatment plants. In addition, several major h·ansportation corridors and bridges, storm water retention basins/outfalls, channel alteration areas, h·ansmission line right-of-ways, and substations were located with the drinking water protection area.

Of the potential sources of contamination identified in the OC-SFWB, NCCWC, and CRW's portion of the protection area, 96 1 pose a relatively higher to moderate risk to the drinking water supply. This provides a quick look at the existing potential sources of contamination that could, if improperly managed or released, impact the water quality in the watershed. The susceptibility analysis combines the results of the locations of the potential contaminant sources with the locations of the sensitive areas. Overlaying the locations of the moderate- to high-risk sources within the sensitive areas provides an indication of the areas that are highly susceptible to contamination. In the OC-SFWB, NCCWC, and CRW portion of the watershed, the results of the susceptibility "analysis" include the distribution of 445 identified high- to moderate-risk sources within the areas of highly permeable soils, high erosional soils, high runoffpotential soils, and within the 1000' setback from the streams. There are an additional 196 high to moderate risk sites with unknown location and sensitivity. The susceptibility analysis provides the community and the public water system with information on where the greatest risk occurs and where to focusresources forprotection of this valuable drinking water resource.

Oregon Source Water Assessment Report 2 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water - PWS # 4100591, 4100580, and 4100187 Introduction In 1996, Congress amended the SafeDrinking Water Act, implemented some new requirements, and provided resources for state agencies to assist communities in protecting the sources of their public water supplies. The US Environmental Protection Agency (EPA) developed guidelines for implementing the new requirements to conduct "source water assessments" (EPA, 1997). In Oregon, the Oregon Department of Human Services (DHS) and the Department of Environmental Quality (DEQ) are conducting the source water assessments. An assessment such as this one will be done for eve1y public water system in Oregon regulated by the Safe Drinking Water Act. DEQ and DHS will each have specific tasks in accomplishing the assessments for a total of 2656 public water systems in Oregon. Of those 2656 public water systems, about 90% of these are groundwater systems drawing water from wells or springs, and l 0% are surface water systems with intakes on streams, rivers, or lakes/reservoirs.

The assessments in Oregon include delineating the source area supplying the public water system, identifying areas "sensitive" to contamination, and conducting an inventory of potential contamination sources in the area. Using the results of the inventory and sensitive areas, the susceptibility of the public water systeni is determined. DHS will provide the delineation for all groundwater systems and the identificationof the sensitive areas within their source area . DEQ will delineate and identify the sensitive areas within the watersheds for the surface water systems. DEQ will conduct all inventories of the potential contaminant sources inside the drinking water protection areas and this is then used to estimate the public water system's susceptibility to contamination.

Sources of information reviewed during this assessment included U.S. Geological Survey (U.S.G.S.) documents/websites, DEQ reports, EPA/DEQdatabases, and other readily accessible reports. The referencelist provides a few of the good sources of information used in the report. Time constraints do not allow research into all existing technical resources available for each system. As the assessment is performed, assistance from municipal water staff, state/federal land management officials, and community members will increase DHS and DEQ's abilities to characterize local hydrogeologic/hydrologic conditions, site-specific information, and ultimately increase the quality of the assessment. Where possible, DEQ staff has consulted local Natural Resource Conservation Service, county planning agencies, irrigation districts, and other natural resource officials.

Many watersheds in Oregon provide water used for public or "domestic" drinking water supplies, irrigation, industry, hydro power, fish hatcheries, and of course, natural in-stream fish rearing. Watersheds vary considerably in terms of overall health and susceptibility to contamination. Most surface water sources for drinking water are filtered and undergo treatment (disinfection) prior to delive1y to the consumer. The ability to adequately (and cost-effectively) treat drinking water from a surface water source is directly related to the quality of the water at the intake. Surface water intakes for public water supplies are generally very susceptible to increases in coarse sediments. Treatment facilities for public water supplies are very susceptible to increases in fine sediments, nutrients and other organic and inorganic contaminants. Treatment facilities are also negatively impacted by changes in temperature.

Changes in surface water quality parameters can be caused by a variety of factors in any watershed. Detailed consideration of all the variables was beyond the scope of this assessment. The procedures for conducting these assessments were developed by a statewide advisory

Oregon Source Water Assessment Report 3 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 41001 87 committee (Source Water Assessment Plan, 1999). The value of preparing detailed procedures is in the ability to be consistent from one system to the next. There are also severe time constraints for the amount of time allowed to complete each public water system assessment. It is our intent to provide as much informationabout the watershed as our program resources allow.

Using the results of this assessment, the public water system and the local community can then move forward with voluntarily developing and implementing a drinking water protection plan. The requirements for water quality monitoring of public water systems in Oregon provide some degree of assurance of safe drinking water; however, all systems are vulnerable to potential contamination. One of the best ways to ensure safe drinking water and minimize future treatment costs is to develop a local plan designed to protect against potential contamination. Not only will this measure add a margin of safety, it will raise awareness in the local community of the risks of drinking water contamination, and provide information to them about how they can help protect the system. Itis our hope that each community will use the assessment results as a basis for developing a drinking water protection plan.

Background OC-SFWB, NCCWC, and CRW are located in Clackamas County, Oregon. Combined, the water providers serve approximately 90,000 customers in the southeasternportion of the Portland metropolitan area. The drinking water for the OC-SFWB, NCCWC, and CRW is supplied by three individual intakes on the Clackamas River. The intakes are located in the Lower Clackamas River Watershed in the Clackamas Sub-Basin in the Willamette Basin, Hydrologic Unit Code (HUC) # 17090011. DEQ obtained the coordinates for the intakes using a Geographic Positioning System (GPS) in February 1999; these coordinates are available to the public water system operators upon request

The study area for evaluating the extent of the OC-SFWB, NCCWC, and CRW Drinking Water Protection Area (DWPA) includes US Geological Survey topographic maps for the Gladstone, (1984), Damascus (1984), Sandy (1985), Bull Run (1985), Brightwood (1990), Hickman Butte (1980), Rhododendron (1980), High Rock (1985), Three Lynx (1985), Bedford Point (1986), Elwood (1986), Colton (1985), Molalla (1985), Steins Pillar (1985), Cherryville (1985), Estacada (1985), Redland (1985), and Oregon City (1985) quadrangles at the 1:24,000 scale. The surface water intakes plot on the U.S. Geological Survey Gladstone quadrangle topographic map.

Overall, the Clackamas Sub-Basin drains approximately 935 square miles of the northeastern section of the Willamette Basin (USGS). For more than half of its length, the Clackamas River flows tlu·ough forested areas with very rugged te1rnin. The lower reaches flow through agricultural areas and then densely developed areas. The Clackamas begins on the slopes of Olallie Butte, a High Cascade volcano. The river flows 83 miles from its headwaters (elevation 6,000 feet) to its confluence with the Willamette River near Gladstone and Oregon City (elevation 12 feet)(Metro, 1997). Throughout this watershed, numerous small streams and tributary rivers feed the waters of the Clackamas including Rock Creek, Clear Creek, Eagle Creek, North Fork Clackamas River, Roaring River, Oak Grove Fork Clackamas River, Middle Clackamas River, Upper Clackamas River, Collawash River, Hot Springs Fork Collawash River, Fish Creek, and South Fork Clackamas River.

Oregon Source Water Assessment Report 4 Oregon City- South Fork Water Board, North Clackamas County Water Connnission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 The climate in the Clackamas Sub-Basin area is characterized by moderate annual temperature and precipitation variations. Information on climate in the OC-SFWB, NCCWC, and CRW drinking water protection area is based on the National Oceanic and Atmospheric Administration's (NOAA) Oregon City, Eagle Creek and Estacada climate stations (Western Regional Climate Center) which are located at elevations of 170, 410 and 930 feet above mean sea level, respectively. The average annual temperature is 52 to 54 degrees for the Oregon City and Estacada stations (temperature data is not available for the Eagle Creek station). The summers are dry and moderately warm to hot, with temperature highs of approximately 75 to 85 degrees. Winters are cool and wet, with temperatures usually staying above freezing. Average annual precipitation is about 47 inches at the Oregon City station, 60 inches at the Estacada station, 62 inches at the Eagle Creek station with approximately 65% of that occurring between November and March. The climate stations get an average of almost 4.4 inches (Oregon City) to 6 inches (Estacada) of total snowfall per year but have no measurable snow accumulation during the winter months.

Delineation of the Protection Area Methodology The delineation of the source area or the "drinking water protection area" is a fundamental aspect of the assessment of a public water system. For surface water systems such as OC SFWB, NCCWC, and CR W's, the drinking water protection area delineation process begins by identifying the watershed. The watershed area is also called the catchment basin of a receiving water body. The outer boundary of this watershed is the drainage divide formed by the surrounding ridges and hills. The surface water delineation includes the entire watershed area upstream of the public water system intake sh·ucture. This watershed area provides "source" water to the surface waterintake.

For surface water systems that encompass an area greater than 100 square miles, such as OC SFWB, NCCWC, and CRW's, DEQ has also estimated the area within an 8-hour time of travel from the intake. The 8-hour time of travel distance was estimated using US Environmental Protection Agency (EPA) Reach File (RF 1) streamflow data forspecific segments of streams (US EPA, 1998). The EPA data set contains arcs depicting streams and waterbodies shown on 1 :500,000 NOAA aeronautical charts and the attributes for those features. Stremnflow data were developed using the EPA Storage and Retrieval database (STORET) and most streamflow information in this data set are estimates. For estimating the 8-hour time of travel distance, DEQ used EPA 's "MNVELO" attribute which provides a calculated stream velocity in the reach at mean flow. For purposes of this assessment, the 8-hour time of travel is calculated only for the reach segment of the intake.

A map of the drinking water protection area provides the community with the knowledge of the geographic area providing the water to the intake. The 8-hour time of travel area is provided as a planning tool for the communitysince eight hours should provide adequate response time to protect the integrity of the public water system intake after a spill or release at any crossing or discharge point to the stream. This area within an 8-hour time of travel from the intake is the area where contamination poses the greatest threat to the drinking water supply. However, potential risks to the water supply can exist throughout the watershed . This is the area where contamination poses the greatest threat to the drinking water supply. Infommtion about the

Oregon Source Water Assessment Report 5 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 drinking water protection area allows the community to develop management strategies that will have the most impact on protecting the source of the drinking water.

Results DEQ has collected and reviewed data for the purpose of delineating the drinking water protection area for OC-SFWB, NCCWC, and CRW's intakes on the Clackamas River. The scope of work for this report included collecting information from the water system operator, researching written repoi'!s, estimating the 8-hour time of travel distance from the intake, and establishing a Geographic Information Systems (GIS) basemap of the delineated watershed.

There are a total of six water providers in the Clackamas Sub-basin. The intake forLake Oswego Municipal Water is located downstream of the OC-SFWB intake and the intakes for the City of Estacada and the US Forest Service (USFS) Timberlake Job Corps Center are located upstream of the CRW intake. For watersheds with more than one drinking water intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next intake upstream. The SFWB, NCCWC, and CRW water systems agreed to collaborate and conduct one Source Water Assessment for the area upstream of their intakes between the OC-SFWB intake and the Estacada intake. The drinking water protection areas within the Clackamas Sub-basin are presented in Figure 1.

This assessment addresses the geographic area providing water to OC-SFWB, NCCWC, and CRW' s intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection area) between the OC-SFWB intake and the upstream intake for Estacada. This portion ofthe drinking water protection area is shown in Figure 2. The delineation for the protection area upstream of the Estacada intake (including the area upstream of the USFS Timberlake JCC's intake) is presented in Appendix B.

OC-SFWB, NCCWC, and CR W's portion of the drinking water protection area extends upsh·eam approximately 335 miles (approximately 1,130 miles including area upstream of the Estacada intake) in a southeasterly direction. The OC-SFWB, NCCWC, and CRW portion of the delineation encompasses a total area of 264 square miles (939 total square miles for the Clackamas watershed including the area upstream of the Estacada intake). Included in OC SFWB, NCCWC, and CRW portion of the delineation are a number of tributaries to the Clackamas River including Rock Creek, Richardson Creek, Clear Creek, Eagle Creek, Deep Creek, Foster Creek, and Goose Creek as well as their tributaries. A summary of the cumulative river miles and watershed areas follows:

Summary of Stream Miles for Clackamas River Public Water Systems

1 PWS PWSName Segment Area Cumulative Stream Number (stream miles) Miles' (miles) 4101093 USFS Timberlake JCC 127.5 127.5 4100279 City of Estacada 666. I 793.6 4100187 Clackamas River Water 329.3 1122.9 4100580 Oak Lodge Water District 1.6 1124.5 4100591 Oregon City - South Fork Water Board 4.0 1128.5 4100457 Lake Oswego Municioal Water 0.8 1129.3

6 Oregon Source Water Assessment Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water-PWS # 4100591, 4100580, and 4100187 Summary of Watershed Areas for Clackamas River Public Water Systems

PWS PWS Name Segment Area' Cumulative Number (square miles) Watershed Area' (square miles) 4101093 USFS Timberlake JCC 131 131 4100279 City of Estacada 543 674 4100187 Clackamas River Water 261 935 4100580 Oak Lodge Water District 0.7 936 4100591 Oregon City - South Fork Water Board 2.4 938 4100457 Lake Oswego Municipal Water 0.8 939

Notes: PWS - Public Water System I. Stream miles or watershed area (drinking water protection area) between the PW S's intake and the next upstrean1 intake. 2. Stream nriles or watershed area (drinking water protection area) between the PWS's intake and the top of the watershed. Includes "seg1nent areas" for upstream intakes.

Based on the EPA Reach File data, the mean velocity for the segment of the Clackamas River where OC-SFWB, NCCWC, and CRW's intakes are located is 2.62 feet/second, which is used to calculate an estimate of 14.3 miles traveled in an 8-hour period. This distance is shown on Figures 1 and 2 as the approximate 8-hour time of h·avel to the intake.

The intakes for OC-SFWB, NCCWC, and CRW are located at an approximate elevation of 30 to 40 feet as Clackamas River flows into the valley floor from the Cascade Range. The upper edge of the OC-SFWB, NCCWC, and CRWportion of the delineated protection area is located at an elevation of approximately 4,650 feet near Squaw Mountain. The headwaters of the Clackamas River are around Timothy Lake and Ollalie Butte with an elevation high of7,200 at Ollalie Butte; therefore, the elevation change from the upper edge of the watershed to the intake is approximately7,200 feet.

Oregon Source Water Assessment Report 7 Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water-PWS # 4100591, 4100580, and 4100187 Identification of Sensitive Areas Methodology After delineating the entire watershed, DEQ identified the "sensitive areas" within the watershed. The objective in determining the sensitive areas fo r swface water sources is to produce reliable information to the community and public water system that is usejitl in developing and prioritizing protection strategies. The list of the sensitive areas to be identified within drinking water watersheds was definedby the DEQ advisory committee as the procedures were developed (SWAP, 1999). The sensitive areas within a drinking water watershed includes both setbacks (land adjacent to stream) and other natural factors that increase the risk of contamination of the surface water. The result is an identificationof a subset of the entire watershed. The sensitive areas are those where potential contamination sources or land use activities, ifpresent, have a greater potential to impact the water supply.

In establishing sensitive areas in a watershed, there are several limiting factors to take into account. In using a Geographic Information System (GIS) to delineate the sensitive areas within the watershed, DEQ locates existing GIS layers and other natural resource agency data sets. Not all areas of the state have been mapped for the natural resource parameters of interest or at the level of detail ideal for this type of analysis. The availability of data at appropriate scales is also a potential limitation. The sensitive area mapping may be limited simply by the lack of readily available data, and conducting additional research is not possible within the time frame allowed to do this assessment. DEQ staff has sought to obtain the best available information for each water system as the source water assessment was performed.

There are four individual characteristics that determine the sensitivity of areas within the drinking water watersheds in the Source Water Assessment Plan (1999) procedures for Oregon water systems. A brief description of the sensitive area characteristics and the sources of the GIS data are included below.

Sensitive Area Setbacks The first sensitive area is a setback using a consistent 1000' (about 300 meters) distance from the water body. The l 000' sensitive area setbacks are intended to identify those areas where there are higher risks of contamination by spills or other releases, simply due to their proximity to the water body. The sensitive area setbacks are identified as a minimum of l 000' from centerline of the intake stream and all perennial tributaries within the delineated drinking water watershed. The distance of 1000' was based on EPA national guidance forthe distance to conduct the potential contamination source inventories adjacent to streams.

High Soil Erosion Potential The soil erosion potential/or non-forest service lands is determined by combining the effects of slope and the soil erodibility factor ("K-factor"). Slopes within a watershed are evaluated using the 1:24,000 SSURGO (Soil Survey Geographic Database) data sets from the Natural Resources Conservation Service. The slope fora map unit is a weighted average of the average slope. The soil erodibility factor is also available in the SSURGO database and quantifies the susceptibility of soil particles to detachment and movement by water including the effects of rainfall, runoff, and infiltration. The K factorused is a weighted average of only the value forthe surface layer of the map unit. In the watershed, only soils with "high" erodibility ratings were mapped as sensitive

8 Oregon Source Water Assessn1ent Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 areas. Soils that classify as "high" include soil with slopes greater than 30% and K factors greater than 0.25. This rating system is based on the Revised Universal Soil Loss Equation from the USDA Agricultural Research Service as defined in the Washington's Standard Methodology for Conducting Watershed Analysis (Washington Forest Practices Board, 1993).

Soil Resource Inventory (SRI) informationfrom the US Forest Service was used for Mount Hood National Forest lands. The SRI data does not provide a soil-erodibility factorthat is comparable to SSURGO data. Therefore, the Sedimentation Yield Potential (which is used as a suffogatefor the combination of slope and K Factor) is used. The SRI data provides this Sedimentation Yield Potential factor for "natural" conditions and for "accelerated" conditions (which assumes human disturbance on the soils such as logging or construction). DEQ used the "natural" conditions factor since this was more similar to the fields used from the SSURGO data.

High Pcmieability Soils Soils identified in the U.S. Geological Survey geologic map of Oregon GIS layer (I :500,000 scale) as Recent Alluvial Deposits (Qal), Dune Sand (Qd) and Landslide and Debris Flow Deposits (Qls) are mapped as sensitive areas due to the high potential for groundwater recharge adjacent to the stream. Alluvial deposits, dune sand and landslide deposits are typicallyvery high permeability soils. These areas may be very vulnerable to rapid infiltrationof contaminants to groundwater and subsequent discharge to a stream or lake/reservoir.

High RunoffPotential The potential for high runoff rates fo r non-forest servicelands was evaluated using the 1:24,000 SSURGO (Soil Survey Geographic Database) data sets from the Natural Resources Conservation Service. Class D soils, which are definedas soils with very slow infiltrationrates were mapped as sensitive areas within the boundaries of the drinking water protection area. Map units are assigned to hydrologic groups based on their majoritycomponent. A Class D soil is typified as clayey, has a high water table, or an impervious layer occurs at a shallow depth. Soils with these characteristics would have the potential for rapid runoff and subsequent transport of sediments and possible contaminants to the surface water body supplying the public water system.

Hydrologic soil group Soil Resource Inventmy (SRI) information from the US Forest Service was used for Mount Hood National Forest lands. In some cases, the SRI data does not identify a dominant soil type. Where dominant soil types were not specified in the SRI data, DEQ assumed the most conservative soil type applies and used those areas that were classifiedas "Group D" (soils with slow infiltration rates) to identify areas sensitive to high runoffpotential.

Additional Sensitive Areas There may be other natural characteristics within a watershed that can be mapped as sensitive. Modifying the list of sensitive areas in this assessment can be done by the public water system or the community by identifying resources and procedures that are appropriate for the individual system. For example, the local community may choose to add "transient snow zones", high rainfall areas, and landslide/debris-flow hazards to the sensitive areas within their watershed. Due to time constraints, these additional areas

Oregon Source Water Assessment Report 9 Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 will not be mapped by DEQ as part of this source water assessment, but can be added by the local community before developing a protection plan.

Transient snow zones are typically defined as areas above 1500 feet in the Oregon Coast Range, or above 2000 feet in the Cascades. In some watersheds, these areas may be subject to rapid snowmelt or rain-on-snow events which increase the likelihood of transport of sediments to the surfacewater bodies in the watershed. Areas of high rainfall or irrigation rates may increase the likelihood of transport of sediments and possible contaminants to the surface water body. These areas can be identified using average annual precipitation data from Oregon Climate Service (years 1961 through 1990) and irrigation/water rights data from Oregon Water Resources Department's water rights database. Mapping the high risk landslide and debris-flow areas can also be useful for evaluating sediment risks from natural hazards within a drinking water watershed. The Department of Forestry has recently completed GIS-based landslide and debris flow maps for western Oregon (Website address: http://www.odf.state.or.us/gis/debris.html).

The final watershed map for each public water system intake includes a composite of all sensitive areas identified by DEQ within the watershed. This composite or overlay will enable the communities and responsible agencies to focus future protection efforts in these sensitive areas.

Results The sensitive areas within the OC-SFWB, NCCWC, and CR W's portion ofthe drinking water protection area are shown on Figure 3. Maps ofthe sensitive areas in the drinking water protection area upstream of the City ofEstacada and USFS Timberlake JCC intakes are provided in Attachment B. These include the setbacks from Clackamas River and all perennial tributaries, areas of high soil permeability along the Clackamas River and Clear Creek, areas of high soil erosion potential and high runoff potential throughout the watershed. Good data coverage was available for the OC-SFWB, NCCWC, and CRW watershed for each of the sensitive areas.

10 Oregon Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 Inventory of Potential Contaminant Sources Methodology The primary intent of an inventmy is to identify and locate significantpotential sources of any of the contaminants of concernwithin the drinking water protection area. Significant potential sources of contamination can be definedas any facility or activity that stores, uses, or produces the contaminants of concern and has a sufficientlikelihood of releasing such contaminants to the environment at levels that could conb"ibute significantly to the concentration of these contaminants in the source waters of the public water supply. Aninventory is a very valuable tool for the local community in that it: • provides information on the locations of potential contaminant sources, especially those that present the greatest risks to the water supply, • provides an effective means of educating the local public about potential problems, • provides valuable awareness to those that own or operate facilities and land use activities in the drinking water protection area, and • provides a reliable basis for developing a local protection plan to reduce the risks to the water supply.

Inventories are focused primarily on the potential sources of contaminants regulated under the federalSafe Drinking Water Act. This includes contaminants with a maximum contaminant level (MCL), contaminants regulated under the Surface Water Treatment Rule, and the microorganism Cryptosporidium. The inventmy was designed to identify several categories of potential sources of contaminants including micro-organisms (i.e., viruses, Giardia lamblia, Cryptosporidium, and fecalbacteria); inorganic compounds (i.e., nitrates and metals); organic compounds (i.e., solvents, petroleum compounds and pesticides) and turbidity/sediments. Contaminants can reach a water body (groundwater, rivers, lakes, etc.) from activities occurring on the land surface or below it. Contaminant releases to water bodies can also occur on an area wide basis or from a single point source.

When identifj1ingpotential risks to a public water supply, it is necessmy to make "worst-case" assumptions. This is important because it is the POTENTIAL risk that we are attempting to determine through this procedure and it is simply 1101 possible within our time constraints to conduct individual reviews or inspections at any ofthe fa cilities or land uses. The worst-case assumption thqt is made when considering potential risks to water bodies is that the fa cility or activity is not employing good ma11age111ent practices or pollution prevention. Under today's regulatory standards and environmental awareness, the 111ajority ofthe identified activities and land uses employ "best 111anagement practices" (BMPs) in handling conta111i11a11ts or preventing water quality degradation fro111 their operations. It is important to note that while this assess111e11t will list all POTENTIAL risks, many of these do not present actual risks to the water syste111. Environ111ental contamination is not likely to occur when contaminants are handled and used properly, or when BMPs are employed. The day-to-day operating practices and environmental (contamination) awareness varies considerably from one fa cility or !and use activity to another. In-depth analysis or research was not completed to assess each specific source's compliance status with local, slate and/or fe deral programs or laws. Further, the invento1y process did 1101 include an atte111pt lo ide11/ifj1 unique co11/a111i11ation risks at individual sites such as fa cilities (permitted or not) that do not safely store pote11/ially hazardous

Oregon Source Water Assessment Report 11 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 materials. After the assessment is completed, the next step is to conduct an "enhanced" invent01y that will look at the site-specific practices. The potential sources listed in the assessment that employ BMPs (required through regulations OR voluntaril;� can be removed fr om the list during the nextstep in the process ofdeveloping a voluntmy drinking water protection plan.

Assumptions are also made about what potential contamination sources are included in the various types of land uses. For example, it is assumed that rural residences associated with farming operations have specific potential contamination sources such as fuel storage, chemical storage and mixing areas, and machinery repair shops. Again, any errors in these assumptions can be easily corrected as the community moves beyond the assessment to develop a protection plan.

Past, current, and possible future potential sources of contaminants were identified through a variety of methods and resources. The identification of potential contaminant sources was conducted by public water system staffand volunteers from the Clackamas Basin Watershed Council in accordance with Oregon Source Water Assessment Plan methods which are detailed below. The process for completing the inventory for OC-SFWB, NCCWC, and CRW's portion of the drinking water protection area included several steps, which are summarized as follows:

I. Conducted a windshield survey by driving through the drinking water protection area to field locate and verify as many as possible of the potential contaminant source activities. The inventmy looked for potential contaminant sources within four general categories of land use: residential/municipal, commercial/industrial, agricultural/forest,and other land uses (see Table 1). 2. Interviewed public water system officialsand others knowledgeable of the area to identify potential sources that are not listed elsewhere (i.e. historic sites). 3. Assigned high-, moderate-, or low-risk ratings to each potential contaminant source based on the Oregon Source Water Assessment Plan ( 1999). A summary of the types of potential contaminant sources and level of assigned risk is presented in Table I (Summary of Potential Contaminant Sources by Land Use). A summmy of the possible water quality impacts for each potential contaminant source is provided in Table 2. The ''comments" section of Table 3 (Inventmy Results- List of Potential Contaminant Sources) provides justification for any modificationsto the risk rating that may have resulted from field observations that were different from what is typically expectedfor the specific facility. Relative risk ratings are considered an effective way forthe water supply officials and comm1mity to prioritize management efforts for the drinking water protection area. When the local water supply officialsand community "team" enhance the inventory for use in developing management options, further analysis may need to be conducted to more closely evaluate the actual level of risk. 4. Produced final summmy of the inventoried sources and the GIS base map, which are presented in this report.

In most Oregon source water assessments, DEQ attempts to identify if potential contaminant sources are listed as regulated facilities (forexample, if the source is on DEQ's Underground Storage Tank (UST) list, cleanup database (ECSI), State Fire Marshall's list, etc.). DEQ generally reviews the list of regulated facilities and links them to potential contaminant sources identified during the windshield survey. Due to DEQ's limited resources, the large size of the protection area, and the number of potential sources of contamination sources identified during

12 Oregon Source Water Assessment Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 the fieldsurvey, state and federal regulatory databases were not evaluated for this assessment. Adding the regulat01y database information is not required and the information collected by OC SFWB, NCCWC, CRW, and the Clackamas River Basin Watershed Council field survey is more than sufficient for evaluating the potential sources of contamination within the watershed.

Results The invent01y results fo r the OC-SFWB, NCCWC, and CRW portion of the protection area are summarized in Tables 1 through 4 and are shown on Figure 4. Maps and tables detailing potential sources ofcontamination in the drinking water protection area up stream ofthe City of Estacada and USFS Timberlake JCC intake are presented in Appendix B ofthis assessment.

The delineated drinking water protection area is occupied by multiple land uses. A total of 1,127 potential contamination sources were identified within OC-SFWB, NCCWC, and CRW's portion of the drinking water protection area. An additional 51 potential sources of contamination were identified upstream of the Estacada intake. Because ofthe large size of the drinking water protection area above Estacada and DEQ's limited resources, Estacada's invento1y was limited to the lower portion of the watershed along the main-stem Clackamas River. The Upper Clackamas sub-basin (upstream of the mouth of the Collawash river) and the Collawash river sub-basins were not surveyed for potential contaminant sources.

Of the sources identified in the OC-SFWB, NCCWC, and CRW's portion of the protection area, 533 are located in the sensitive areas. There are an additional 199 sites (referencenumbers 929 through 1 127) where the location and sensitivity was not identified during the invent01y. A summary of the total number of each potential contaminant source type identified is presented in Table 1. Table 3 presents details on each potential contaminant source. The coordinates of each potential source of contamination in the Universal Transverse Mercator (UTM) Zone 10, NAD27 projection system is provided in Table 4. The coordinates can be used in conjunction with Figure 4 to estimate the location of each potential contaminant source. In addition, a summary linking potential contaminant sources to sub-watershed is provided as follows:

Summary of OC-SFWB, NCCWC and CRW Inventory Results by Sub-Watershed

Reference Numbers Sub-Watershed (as identified in Table 3 and Table 4) Oregon City -SFWB (area between OC intake and NCCWC intake) 1- 14 NCCWC (area between NCCWC intake and CRW intake) 15-46 Lower Main Stem Clackamas River 47 -272 Clear Creek 27 3-364 Foster Creek 365-369 Rock Creek 37 0-4 12 Richardson Creek 413-425 Goose Creek 426-443 Deep Creek 444-845 Eagle Creek 846-928 Unmapped points (located throughout the protection area - no field mapping was completed for these potential sources) 929- 1 127

Oregon Source Water Assessment Report 13 Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 Potential contaminant sources identified in the watershed include but are not limited to the following:

Agricultural Management. l!Tigated and non-irrigated crop areas, managed forest lands, animal grazing areas, boarding stables, confined animal feeding operations, farm machinery repair shops, and chemical mixing/storage/handling areas.

Conunercial/Industrial. Parking lots/malls, fleet/trucking terminals, gas stations, body/repair shops, chemical processing/storage facilities, food processing facilities, junk/scrap/salvage yards, machine shops, metal plating/finishing/fabrication shops, wood/pulp/paper processing facilities, and other manufacturing land uses

Residential/Municipal. High density housing areas, a landfill, rural homesteads with septic systems, campgrounds, parks, golf courses, waste transfer/recycling stations, utility stations, and wastewater treatment plants.

Miscellaneous. Several major transportation corridors and bridges, storm water retention basins/outfalls, channel alteration areas, transmission line right-of-ways, and substations.

Susceptibility Analysis Methodology Susceptibility can be defined as the potential forcontamination in the drinking water protection area to reach the intake on the surface water body being used by a public water system for drinking water purposes. Whether or not a particular drinking water source becomes contaminated depends on three major factors: I) the occurrence of a facility or land use that releases contamination, 2) the location of the release, and 3) the hydrologic and/or soil characteristics in the watershed that allow the transport of the contaminants to the surface water body.

Illconducting a susceptibility analysis the first step is identifying that part of the watershed that is most sensitive to contamination. This was accomplished afterthe delineation phase of this assessment. The second step consists of identifying and locating the potential contaminant sources in the drinking water protection area. Based on the type of facility and the nature of the chemicals they use, these sources represent a lower-, moderate-, or higher-relative risk to the surface water body. This step was accomplished in the inventory phase of the assessment.

The third step in the susceptibility analysis is to overlay the results of the inventory with the map of the sensitive areas. The results of the inventory are analyzed in terms of cm1·ent, past, and future land uses; their time-of-travel relationship or proximity to the intake site; and their

Oregon Source Water Assessment Report 14 Oregon City- South Fork Water Board, North Clackamas County Water Connnission, and Clackamas River Water-PWS 11 410059 1, 4100580, and 4100187 associated risk rating. In general, land uses that are closest to the intake and those with the highest risk rating pose the greatest threat to a drinking water supply. The presence and locations of the potential contamination sources within the sensitive areas will determine where the water system has the hi ghest susceptibility to contamination. The susceptibilityanalysis cannot predict when or if contamination will actually occur, but it does recognize conditions that are highly favorable for contamination to occur. If a contaminant release to soils or water should occur in a sensitive area, it is very likely that contamination of the surface water body would occur if remedial actions are not undertaken.

When several high or moderate risk sources are located within the sensitive areas, the public water system may also be said to have a high overall susceptibility to contamination. If a public water system's drinking water source is determined to be of high susceptibility, it is recommended that the system identify those condition(s) that lead to the high susceptibility and take steps to protect the resource (e.g., reducing soil erosion, or working directly with facility operators to implement sound management practices, etc.). Water systems with a low susceptibility should consider all identified factors that could lead to higher susceptibilityin the future and take action to prepare a strategy to protect the resource in the future.

Results The results of the potential contamination source inventory are combined with the locations of the sensitive areas to determine the most susceptible areas within OC-SFWB, NCCWC, and CRW' s portion of the drinking water watershed. The total number of sources within the sensitive areas are summarized as follows:

Summary ofOC-SFWB, NCCWC and CRW Susceptibility Analysis

Within Not in Total Within Unknown Outside Total Sensitive Sensitive DWPA Locations and of DWPA PCSs Areas of Areas of (not including Sensitivity Identified DWPA DWPA sources \Vith unkno\Vll location) Total Number o High and 445 290 735 196 30 961 Moderate Risk PCSs Higher Risk PCSs Identified 345 242 587 98 25 710 Moderate Risk PCSs Identified 100 48 148 98 . 5 251 Lower Risk PCSs Identified 88 70 158 3 5 166 Total Potential Contamination 533 360 893 199 35 1,127 Sources Identified

Notes: PCSs - Potential Contamination Sources D\VPA - OC-SF\VB, NCCWC, and CR\V portion of the Drinking Water Protection Area

Oregon Source Water Assessment Report 15 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 Overlaying the locations of the moderate- to high-risk sources with the sensitive areas provides an indication of the areas that are highly susceptible to contamination. The susceptibility analysis results are shown on Figure 4 (Source Water Assessment Results). Wherethe moderate- to higher-risk sources fa ll within the sensitive areas are those areas most vulnerable to co11taminatio11. In the OC-SFWB, NCCWC, and CRW portion of the watershed, it includes the distribution of the 533 identified sources within the areas of highly permeable soils, high erosional soils, high rnnoffpotential soils, and within the 1000' setback from the streams. There are an additional 199 sites with unknown location and sensitivity. In general, potential contaminant sources within the sensitive areas in the lower watershed pose greater risk than those in the higher areas of the watershed. The susceptibility analysis provides the water system with information on where the greatest risk occurs and where to focus resources for protection.

When all of the assessments are completed in Oregon, DEQ will provide a second type of susceptibility analysis for the surface water systems, an "inter-system susceptibility" on a statewide basis. DEQ will develop a summaiy report describing how the OC-SFWB, NCCWC, and CRW watershed compares with other drinking water watersheds in the state. To normalize the results of the assessments, the total number of potential contamination sources will not be used. The density of the moderate- to higher-risk sources within the drinking water protection area and within the sensitive areas will be calculated. This comparison will be based upon the number and distribution of the potential contamination sources in the watersheds that serve as drinking water resources. The purpose is not to rank individual systems, but to provide general groupings of overall risk relative to other Oregon public water systems. This will enable state agencies to develop priorities for staffingand funding more detailed assessments and protection measures.

Summary and Recommendations This assessment provides a basis for focusing limited resources within the community to protect the drinking water source. The delineation provides the community with information regarding the location of the land area that directly supplies the surface water intake, i.e., the drinking water protection area. The sensitive areas are those where potential contamination sources or land use activities, if present, have the greater potential to impact the water supply. When the sensitive area information is combined with the potential contaminant source inventory, the highly vulnerable areas are identified (referred to as a susceptibility analysis). These should become high priority areas to be addressed first with educational information, technical assistance, and focused outreach to landowners to encourage voluntaiy cooperation in protecting the water qualityin this watershed.

This assessment provides a basis for infonned decision-making regarding community planning. The delineation, invent01y and susceptibility analysis provides the community with a significant amount of information regarding where their drinking water comes from and an identi fication of some of the potential risks to the quality of that source. For example, knowing the location and status of the source area allows the community's planning authority to potentially make informed decisions regarding proposed land uses that are compatible with both the drinking water resource and the vision of community growth embraced by the community. Educating the community citizens about the susceptibility and risks to your system enables more public involvement in any future decisions about the public water system.

16 Oregon Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 The results of this Source Water Assessment and the recommendations based on the results are summarized below.

+ Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water's public water system draws water from Clackamas River. The source of this water is within the Clackamas Sub-Basin of the Willamette Basin. OC-SFWB, NCCWC, and CRW's drinking water protection area extends approximately 335 miles (approximately I, 130 miles including area upstream of the Estacada intake) in a southeasterly direction. The OC-SFWB, NCCWC, and CRW portion of the delineation encompasses a total area of 264 square miles (939 total square miles including the area upstream of the Estacada intake). Included in this area are a number of tributaries to the main stem, including Rock, Richardson, Clear, Eagle, Deep, Foster, and Goose Creeks and their tributaries.

+ It is recommended the OC-SFWB, NCCWC, and CRW water systems and communities consider increased protection within an 8-hour travel time from the intake (extending approximately 14.3 miles upstream of the OC-SFWB, NCCWC, and CRW intake) since eight hours should provide adequate response time to protect the integrity of the public water system intake should a spill or release occur at any crossing or discharge point to the stream.

+ This source water assessment addresses the geographic area providing water to OC-SFWB, NCCWC, and CRW' s intake (SFWB, NCCWC, and CRW's portion of the drinking water protection area) between OC-SFWB 's intake and the upstream intake for Estacada. Information on OC-SFWB, NCCWC, and CRW's protection area upstream of the Estacada intake (including the area upstream of the USFS Timberlake JCC intake) is presented in the Source Water Assessment for those public water systems and is summarized in this report. In addition, the intake for Lake Oswego Municipal Water is located on the Clackamas River downstream of the OC-SFWB, NCCWC, and CRW intakes. Activities and impacts in the OC-SFWB, NCCWC, and CRW drinking water protection area have the potential to also impact downstream users.

+ Within the OC-SFWB, NCCWC, and CRW portion of the drinking water protection area, there arc large areas identifiedas sensitive to contamination. Areas that are adjacent to the streams/river, areas that have high soil erosion potential, high runoff potential, and high permeability should all receive special considerations for protection. These are some of the areas where the risk is greatest for existing anclfu ture potential sources of contamination impacting the water quality in the watershed. It is recommended that other natural conditions be considered and possibly added to the assessment results before proceeding with voluntary development of a drinking water protection plan.

There are also some highly-permeable soils adjacent to Clackamas Rive1: and Clear Creek that should be considered higher risk for groundwater contamination. These areas are very sensitive to any spills or release to soils because the contaminants could rapidly infiltrate into groundwater and discharge to Clackamas River. The communityshould take steps to evaluate cmTent and future land use in areas of highly permeable soils. The facilities or land uses that have been identifiedeither on or in close proximity to these soils should be informedof the sensitive nature of the area and encouraged to adopt best management practices designed to minimize the risk of a contaminant release.

Oregon Source Water Assessment Report 17 Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water-PWS # 4100591, 4100580, and 4100187 + The susceptibility of the public drinking water system source depends on both the natural conditions in the watershed as we ll as the land uses and facilities operating in the watershed. The purpose of the susceptibility exercise is to identify those factors that may pose more of a risk than others within the community's drinking water protection area. Itprov ides information with respect to facilities or land uses in the sensitive areas within the drinking water protection area that should be given greater priority in developing protection strategies. A review of the inventory and the sensitive areas indicates that the OC-SFWB, NCCWC, and CRW public water system has at least 445 high and moderate-risk sources within the sensitive areas in the watershed. It is highly recommended that the community "enhance" or refine the delineation of the sensitive areas and the identification of the potential contamination sources through further research and local input.

+ Due to the streamlined procedures for conducting the source water assessments, the results could potentially create a misperception that the "human activities" within the watersheds are higher risks than natural conditions or disturbances such as landslides and storm events. For example, it would be erroneous for communities to conclude that their source water was not at risk from natural conditions that produce sediments such as landslides, even if there were no potential contamination sources identified within their watershed. It is recommended that the community take steps to ensure the natural conditions (both those identified in this assessment and any other additional areas identified by the community) within the watershed are considered when developing strategies for protection.

+ Public water systems may be threatened by contamination already in the surface water. Many public water systems conduct routine tests for contamination in the raw water prior to treatment. It is highly recommended that such data be used to determine existing risks in the watershed. Collecting and analyzing this raw water data by DEQ or DHS has not been done and is beyond the scope of this assessment.

+ This assessment provides a basis for dealing with future water quality work in the watershed. The delineation, inventory, and susceptibility analys is has been designed to serve as a strong foundation for further in-depth watershed assessments or water quality improvement efforts, such as Oregon's Total Maximum Daily Load (TMDL) plans.

+ The primary intent of this source water assessment is to provide the background information for the community to use in developing a local Drinking Water Protection Plan. The OC SFWB, NCCWC, and CRW and/or the public water system should assemble a team to assist in the development and implementation of a Drinking Water Protection Plan. Clean safedrink ing water is fundamental to the viability of any community. Protecting the drinking water source is a wise and relatively inexpensive investment in the community's future. The next section will discuss this voluntary process.

18 Oregon Source Water Assessment Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 Developing a Drinking Water Protection Plan This Source Water Assessment (SW A) Report for your public water system is a compilation of the results of the delineation of the source area, identification of the sensitive areas, and an inventory of significantri sks. The final product, the susceptibility analysis, provides the basis for prioritizing the areas in and around your community that need to be protected. As we discussed in the introduction, our hope is that the community will use the assessment as a basis for developing a "Drinking Water Protection Plan".

The process for developing a complete Drinking Water Protection Plan can be summarized as follows:

ASSESSMENT PHASE (Source Water Assessment Report performed by DEQ and DHS) 1. Delineate the area that serves as the source of the public water supply ("drinking water protection area" forgroundwater wells or surface water intakes) 2. Invento1y the potential risks or sources of contamination 3. Determine the areas most susceptible to contamination PROTECTION PHASE (performed by community) 4. Assemble a local Drinking Water Protection Team 5. Enhance the Source Water Assessment 6. Develop a plan to protect the supply (reduce the risks of contamination) 7. Develop a contingency plan to address the potential loss of the system 8. Certify (optional) and implement the Drinking Water Protection Plan

As you know, the assessment phase work was funded by the federal Safe Drinking Water Act. The assessment is simply the first three steps of developing a protection plan foryo ur public water supply. Developing a protection plan is voluntary.

Prior to moving into the protection phase, DEQ recommends the invento1y presented in th is document be reviewed in detail to clarify the presence, location, operational practices, actual risks, etc. of the identified facilities and land use activities. The SWA inventory should be regarded as a prelimina1y review of potential sources of contamination within the drinking water protection area. Resources within the community should be used to do an "enhanced inventory" to complete th is preliminaty list of potential sources of contamination.

Itis also important to remember that not all of the inventoried activities will need to be addressed if yo u choose to develop a Drinking Water Protection Plan. When developing a protection plan, sources which pose little to no threat to yo ur public water supply can be screened out. For example, if any of the land use activities are conducted in a manner that already significantlyredu ces the risk of a contamination release, the facility would not need to re-evaluate their practices based on drinking water protection "management". One of the goals of developing a Drinking Water Protection Plan based on the inventory results is to address those land use activities that do pose high or moderate risks to your public water supply. The community should target these facilities with greater levels of education and te chnical assistance to minimize the risk of contamination.

Limited technical assistance is available through both DEQ and DHS for communities that choose to move beyond the assessments and voluntarily develop a Drinking Water Protection Plan. Using the results of the assessment (and enhanced invent01y), the local community can

Oregon Source Water Assessment Report 19 Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water-PWS # 4100591, 4100580, and 4100187 form a "Drinking Water Protection Team" of community members and develop a plan to reduce the risks of contamination from those sources.

Forming a local team to help with the development of a protection plan is ve1y important. Oregon's drinking water protection approach relies upon the concept of "community-based protection", as are many other water quality programs. Community-based protection simply refers to the concept of allowing local control and decision-making to implement the water quality protection effort. Community-based protection is successful only with signif icant local citizen and stakeholder involvement.

The prima1y advantage of community-based protection is that it links community needs to environmental needs. Any successful protection program will need to be flexible enough to allow the community to adopt the "tools" or elements that are most appropriate for them. Allowing this local control in making the changes necessaiy for improving water qualitywi ll accomplish two key elements of restoration and protection. Community-based protection can draw on the knowledge and successful adaptive practices of the local area. Landowners generally know best how to achieve water resource restoration and protection as long as a thorough explanation of the problem is provided, the objectives are defined, and some free technical assistance is provided. Secondly, knowing they have more local control, citizens will also be more likely to participate in the program and more willing to assist with the educational and outreach effort which will make the plan successful. We recommend that the protection plan be developed so as to minimize any burdens 011 individual property owners, but maximize the equity in responsibility fo r reducing the risks of fu ture contamination.

Drinking water protection involves developing protection strategies for groundwater or surface water sources of public water supplies. There are many similarities between this program and other water quality protection programs, and it is essential that water quality efforts are coordinated and linked in each geographic area as much as possible. DEQ is committed to linking the drinking water protection efforts to other habitat and water quality improvement efforts for fish in Oregon, as well as the ongoing work to address Clean Water Act 303(d) water quality-limited streams. One of the primary means of providing technical assistance is to give yo ur community the information and coordination necessary to create these links. Other agencies will also be involved in providing technical assistance as protection plans are developed. For example, on farmlands, the Oregon Department of Agriculture will provide assistance as provided forunder Senate Bill I01 0. In developing recommendations for protecting the drinking water source area, your community can maximize the use of existing programs in Oregon that offer free technical assistance. Ex amples of such programs include : • pollution prevention technical assistance from the Department of Environmental Quality, • sanitary survey assistance from the Oregon Department of Human Services, • household hazardous waste assistance from the Department of Environmental Quality, • land use planning from the Department of Land Conservation and Development, • ag ricultural water quality management plans Oregon Department of Agriculture, • water conservation education from the Water Resources Department, or • rural water quality outreach from the Oregon State University Extension Service.

Protecting the drink ing water supply in a community can also be a very effective way to encourage all citizens to participate in an issue which directly affects everyone in that

20 Oregon Source Water Assessment Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water - PWS # 4100591, 4100580, and 4100187 community. This often leads to more public involvement in other significantlocal decisions concerning future livability issues (i.e., land use planning). Jn communities already developing and implementing Drinking Water Protection Plans, the process has served to bring many diverse interests together on a common goal and strengthened the local rural and urban relationships through communication and increased understanding. We must continue to do a better job in our outreach efforts to point out that we are all part of the existing water quality problems. The risks and sources of water quality problems are not only from industries, farmers, and managed forests,but every individual living, commuting and working in that area.

We encourage communities interested in developing Drinking Water Protection Plans to contact the DEQ or DHS resources listed below:

For tee/mica/ assistance with the mo11itoring and op eration of your public water sys tem :

Oregon Department of Human Services Main Office- Portland Oregon 800 NE Oregon St., Ro om 611 PO Box 14450, Portland, OR97 293 (503)731-431 7 Fax (503)73 1-4077

or : Dennis Nelson, Groundwater Coordinator, (54 1)726-258 7 [email protected] Oregon Department of Human Services Springfield Field Office 442 A Street, Springfield, OR 97 477 Fax (541)726-2596

For tec/mical assistance with developi11g pla11s to protect your public water system :

Department of Environmental Quality Water Quality Division 811 SW 6'h A venue Portland, OR 97 204-1390 (503) 229-5630 Fax (503) 229-5408 Toll Free 1-800-452-4011

Surface Water - Sheree Stewart, (503) 229-54 13 [email protected]

Groundwater - Julie Harvey, (503) 229-5664 [email protected]

Oregon Source Water Assessment Report 21 Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 410059 1, 4100580, and 4100187 References* Metro Regional Services, 1997, Clackamas River Watershed Atlas. Produced with funding from the Environmental Protection Agency. December 1997, 40p.

Natural Resource Conservation Service (NRCS). Soil Survey Geographic Database (SURGGO), National Cartography and Geospatial Center, Fort Worth, Texas. http://www.ftw.nrcs.usda.gov/ssurgo.html

Source Water Assessment Plan: Implementation of the Safe Drinking Water Act 1996 Amendments. Sheree Stewart, Oregon Department of Environmental Quality, and Dennis Nelson, Oregon Department of Human Services, February 1999. http://www.deq.state.or.us/wq/dwp/dwphome.htm

US Environmental Protection Agency, 1997. State Source Water Assessment and Protection Programs Guidance, US EPA Officeof Water, EPA816-R-97-009, August 1997. http://www.epa.gov/ogwdw/swp.hltnl

US Environmental Protection Agency, 1998. US EPA Reach File (RF!)for theCont erminous United States in BASINS. Published 08/01/ 1998, Washington, DC.

US Geological Survey, Oregon Hydrologic Units. http://oregon.usgs.gov/ data_dir/orehuclist. html

US Forest Service (USFS), 1979. Soil Resource Inventory (SRI) Database for the Mt. Hood National Forest.

Washington Forest Practices Board. 1993. Standard Methodology forConducting Watershed Analysis, Version 2.0, October 1993

WesternRegional Climate Center, Oregon Climate Summaries. http://www.wrcc.dri .edu/summary/climsmor.html

*Please note that there are n1any other sources of infonnation for Clackamas River and the Clacka1nas Sub -Basin. Conducting an exhaustive search of all data and technical reports \Vas beyond the scope of this Source Water Assess1nent Report.

22 Oregon Source Water Assessment Report Oregon City- South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water- PWS # 4100591, 4100580, and 4100187 Figures

Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water PWS # 4100591, 4100580, and 4100187

Figure 1. Clackamas Sub-Basin Drinking Water Protection Areas

Figure 2. OC-SFWB, NCCWC, and CRW Portion of the Clackamas Sub Basin Drinking Water Protection Area

Figure 3. Sensitive Areas within the OC-SFWB, NCCWC, and CRW Drinking Water Protection Area

Figure 4. Source Water Assessment Results (in pocket) OC-SFWB, NCCWC, and CRW Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources Figure 1: Clackamas Sub-Basin Drinking Water Protection Area

PWS 4100457/PWS 4100580/PWS 4100591 PWS 4100187/PWS 4100279/PWS 4101093

Drinkinp Water Protection Area

• Drinking Water Intake - Surface Water

For watersheds with more than one Intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's Intake to the next intake upstream. This assessment addresses the geographic area providing water to OC-SFWB, NCCWC, and CRW's Intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection area) between the OC·SFWB Intake and the upstream Intake for Estacada. All protection areas upstream of each water system's Intake are Included In the drinking water protection area. Activities and Impacts In this drinking water protection area also have the potential to Impact downstream water users.

Note on Base Map: 1:100,000 scale U.S. Geological Survey Digital Raster Graphics (DRGs) for Oregon City (1982), Mount Hood (1983), Madras (1983) and North Santlam River (1983) are displayed . DRGs are scanned Images of topographic sheets. Where the DRGs Join, seams and/or gaps may be visible. Between DRGs, variations In Information displayed also may be seen.

Klfomete11 0 10

O I s 8 7 8 Min Printed November, 2002 Oregon Department of Environmental QuaUty GIS Figure 2: OC-SFWB, NCCWC and CRW portion of the Clackamas Sub-Basin Drinking Water Protection Area

PWS 4100591/PWS 4100580/PWS 4100187

Drinking Water Protection Area Drinking Water Intake - Surface Water For watersheds with more than one Intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's Intake to the next Intake upstream. This assessment addresses the geographic area providing water to OC-SFWB, NCCWC, and CRW's Intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection areal between the OC-SFWB Intake and the upstream Intake for Estacada. All protection areas upstream of each water system's Intake are Included In the drinking water protection area. Activities and Impacts In this drinking water protection area also have the potential to Impact downstream water users.

Note on Base Map: 1:100,000 scale U.S. Geological Survey Digital Raster Graphics (DRGsl for Oregon City (19821 and Mount Hood (19831 are displayed. DRGs are scanned Images of topographic sheets. Where the DRGs Join, seams and/or gaps may be visible. Between DRGs, variations In Information displayed also may be seen.

� 1-J"" "\ �· I :

' I '

Kllomettrt

0 2 • 4 Mitt Printed November, 2002 Oregon Department of Enviro nmental Ouattty OIS Sensitive Areas in Watershed Figure 3: Sensitive Areas with in the OC-SFWB, NCCWC High Soil Erosion Potential !Slope > = Percent and Soil Erodlbility Fa ctor > and CAW Drinking Water Protection Area 30 =.26) PWS 4100591/PWS 4100580/PWS 4100187 e Drinking Water Intake - Surface Water

Drinking Water Protection Area Sources of Information: (Clackamas County Area) High Soil Erodlbil1ty: Defined by slopes greater than 30 percent and K factor greeter than .25. Soils derived from 1:24,000, USDA, NRCS, SSURGO certified data. Slope is in the SSURGO database Component Ta ble. Slope displayed is a weighted average of the average slope for the map unit. K factor Is contained In the SSURGO Layer Ta ble. K factor displayed is a weighted average(of only the surface layer) for the map unit. High Runoff Potential: Hydrologlc Group D Ivery slow infiltration rates) from the SSURGO Component Ta ble. SSURGO data have been certified. IMt. Hood National Forest) High Soll Erodibllity: Defined by high sedimentation yield potential of the dominant soil. High Runoff Potential: Hydrologic Group Din the dominant soil. These data are extracted from the Soil Resource Inventory. (Entire Watershed) High Permeability Soils: Alluvial deposits (Oai) from the U.S. Geological Survey Geologic Map of Oregon GIS layer. Sensitive Area Setbacks Adjacent to Streams and Reservoirs: 1000 foot buffer from the centerline of perennial streams and the shoreline of any reservoir. Note on Sensitive Areas: In determining the most sensitive areas within this Drinking Water Protection Area, DEO used existing GIS layers and other natural resource agency data sets. Not all areas of the state have been mapped for the natural resource parameters of Interest or at the level of detail Ideal for this type of analysis. DEO has sought to obtain the best available information for this composite.

Kllometere

� Printed November, 2002 0 10 llliil...... � � Oregon Department of Envlronmentel Ouellty 016 - Com osite of Sensitive Areas 0 10

Mii., Tables

Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water PWS # 4100591, 4100580, and 4100187 Inventory Results

Table 1. Summary of Potential Contaminant Sources by Land Use Table 2. Possible Water Quality Impacts from Potential Contaminant Sources Table 3. Inventory Results - List of Potential Contaminant Sources Table 4. Spatial Coordinates of Potential Contaminant Sources

Notes for Tables • Sites and areas identified in Tables 1 through 4 are only potential sources of contamination to the drinking water. Environmental contamination is not likely to occur when contaminants are used and managed properly. • Total number of sources listed in Table 1 in the DWPA may not add up to the total number of potential contaminant sources in Table 3 because more than one type of potential contaminant source may be present at any given facility. • The data was collected by OC-SFWB, NCCWC, CRW, and the Clackamas River Basin Watershed Council between October 2000 and April 2001.

Acronyms AST - Aboveground Storage Tank DC - DEQ's Drycleaner database DEQ - Oregon Department of Environmental Quality DWPA - Drinking Water Protection Area ECSI - DEQ's Environmental Cleanup Site Information database HWIMSY - DEQ's Hazardous Waste Information Management System database LUST - DEQ's Leaking Underground Storage Tank database NPDES - National Pollution Discharge Elimination System PCS - Potential Contaminant Source PWS - Public Water System SFM - State Fire Marshall's database of hazardous materials SIS - DEQ's Source InformationSystem database (includes WPCF and NPDES permits) SWMS - DEQ's Solid Waste Management System database UST - DEQ's Underground Storage Tank database or Underground Storage Tank WPCF - Water Pollution Control Facility WRD -Oregon Water Resources Division database for water rights information system

TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 41 00591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 41 00187 · CLACKAMAS RIVER WATER · CLACKAMAS

Residential/Municipal Land Uses

Total In Total in Relative Lower Full 31 141 Potential Contamination Source Note Risk Level DWPA1 DWPA Airport · Maintenance/Fueling Area Moderate 4 4 Apartments and Condominiums Lower 6 7 Campgrounds/RV Parks (1) Moderate 5 18 Cemeteries · Pre-1945 Lower 7 7 Drinking Water Treatment Plants Moderate 5 7 Fire Station Lower 8 8 Fire Training Facilities Moderate 1 1 Golf Courses Moderate 6 6 Housing · High Density (> 1 House/0.5 acres) Moderate 55 59 Landfill/Dumps (1) Higher 1 1 Lawn Care - Highly Maintained Areas Moderate 33 33 Motor Pools Moderate 1 2 Parks Moderate 17 18 Railroad Yards/Maintenance/Fueling Areas Higher 7 7 Schools Moderate 14 15 Septic Systems · High Density ( > 1 system/acre) (1) Moderate 13 13 Sewer Lines · Close Proximity to PWS (1) Moderate 1 2 Utility Stations - Maintenance Transformer Storage Higher 17 19 Waste Transfer/Recycling Stations (1) Higher 6 6 Wastewater Treatment Plants/Collection Stations (1) Higher 4 8 Other: Land Disturbance - Recent Logging Moderate 1 1 Other: Water or Wastewater Pump Station Moderate 1 1 Other: Future Residential Land Use Moderate 0 1

NOTES: Sites and areas identified In this Table are only potential sources of contamination to the drinking water. Environmental contamination Is not likely to occur when contaminants are used and managed properly. (1) - Potential source of m!crobial contamination (2) - Drip Irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray Irrigation

(3) - "Lower DWPA" summarizes lhe total number of potential contaminant sources (PCSs) Identified In the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes between the OC-SFWB Intake and the upstream Intake for Estacada. (4) - "Full DWPA" summarizes all PCSs identified in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes (including the PCSs Identified In areas upstream of the Estacada intake and USFS Timberlake JCC's Intakes).

1211 8/2002 Page 1 of ? TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and

PWS # 4100187 - CLACKAMAS RIVER WATER - CLACKAMAS

Commercial/Industrial Land Uses Total In Total In Relative Lower Full ' Potential Contamination Source Note Risk Level DWPAt l DWPA14l Automobiles - Body Shops Moderate 15 15 Automobiles - Car Washes Moderate 1 1 Automobiles - Gas Stations Moderate 17 17 Automobiles - Repair Shops Moderate 46 46 Boat Services/Repair/Refinishing Higher 4 4 CemenVConcrete Plants Moderate 8 8 Chemical/Petroleum Processing/Storage Higher 28 28 Dry Cleaners Moderate 1 1 Electrical/Electronic Manufacturing Higher 0 0 FleeVTrucking/Bus Terminals Moderate 53 54 Food Processing Moderate 16 16 FurniturelLumber/Parts Stores Moderate 14 15 Home Manufacturing Higher 3 3 JunklScraplSalvage Yards Higher 50 53 Machine Shops Higher 42 44 MedicalNet Offices (1) Lower 8 8 Metal Plating/Finishing/Fabrication Higher 29 29 Mines/Gravel Pits Higher 10 10 Office Buildings/Complexes Lower 26 27 Parking Lots/Malls (> 50 Spaces) Higher 97 97 Photo Processing/Printing . Higher 11 11 Plastics/Synthetics Producer Higher 4 4 Research Laboratories Higher 0 0 RV/Mini Storage Lower 5 5 Wood Preserving/Treating Higher 2 2 Wood/Pulp/Paper Processing and Mills Higher 10 10 Other: Moderate 1 2 Other: Beverage Services Lower 1 1 Other: Cabinet Makers Moderate 1 1 Other: Cabinet Manufacturing Moderate 3 3 Other: Cast Molding Higher 1 1 Other: Ceramics Manufacturing Higher 1 1 Other: Commercial & Industrial Coatings Moderate 1 1 Other: Commercial Industrial Coatings Moderate 2 2 Other: Concrete Cutting Moderate 1 1 Other: Construction Company Moderate 12 12 NOTES: Sites and areas identified in this Table are only potential sources of contamination to the drinking water. Environmental contamination Is not likely to occur when contaminants are used and managed properly. (1) - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray Irrigation (3) - ulower DWPA" summarizes the total number of potential contaminant sources (PCSs) identified in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes between the OC-SFWB intake and the upstream Intake for Estacada. (4) - "Full DWPA" summarizes all PCSs idenUfied in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes {including the PCSs fdentified In areas upstream of the Estacada intake and USFS Timberlake JCC's Intakes}.

12118/2002 Page 2 of 7 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and

PWS # 4100187 - CLACKAMAS RIVER WATER -CLACKAMAS

Commercial/Industrial Land Uses (cont.) Total In Total In Relative Lower Full 131 141 Potential Contamination Source Note Risk Level DWPA DWPA Other: Equipment Rental Moderate 1 1 Other: Future Urban Area - High Density Moderate 1 1 Other: Glazing Contractors Moderate 1 1 Other: Gun Club Moderate 1 1 Other: Gun Shop Lower 1 1 Other: Hazardous Chemicals Storage & Transfer Higher 1 1 other: Livestock Vitamins Moderate 1 1 Other: Medical Equipment Manufacturing Higher 3 3 Other: Miscellaneous Maintenance Shop Moderate 1 1 Other: Miscellaneous Manufacturing Lower 1 1 Other: Miscellaneous Manufacturing Moderate 7 7 Other: Miscellaneous Vehicle Repair & Service Higher 1 1 Other: Miscellaneous Vehicle Repair and Service Moderate 3 3 other: Mold & Die Higher 1 1 Other: Mold and Die Higher 1 1 Other: Optical Plastics Moderate 1 1 Other: Paint Shop Moderate 1 1 Other: Parts Distributor for Heavy Equipment Moderate 1 1 Other: Paving Company Moderate 1 1 other: Restaurant & Tavern - parking lot packed gravel Higher 1 1 Other: Retail Feed & Pet Supply Lower 1 1 Other: Rural Market Moderate 1 1 Other: Secondary Wood Products Industry Moderate 1 1 Other: Shooting Range Moderate 2 2 Other: Shopping Cart Repair Moderate 1 1 Other: Street Sweeping & Stripping Moderate 1 1 Other: Tanneries Higher 1 1 Other: Unknown Operations - Industrial/Agricultural Processing - Moderate 1 1 Other: Unmanaged Fields Lower 1 1 Other: Wedding Site with Septic System and Parking Lots Moderate 1 1 Other: Wholesaler of Exotic Bird Supplies Moderate 1 1 other: Fish Research Moderate 1 1 Other: Unknown Business Type Moderate 1 1 Other: Warehouse Lower 1 1

NOTES: Sites and areas Identified in this Table are only potential sources of contamination to the drinking water. Environmental contamination is not likely to occur when contaminants are used and managed properly.

(1) - Potential source of mlcrob!al contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - �Lower OWPA" summarizes the total number of potential contaminant sources (PCSs} Identified in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes between the OC-SFWB intake and the ups!ream ln!ake for Estacada. (4). "Full DWPN' summarizes all PCSs identified In the geographic area providing water to OC-SFWB, NCCWC, and CRW's Intakes (Including the PCSs identified In areas upstream of the Estacada Intake and USFS Timberlake JCC's intakes).

12/18/2002 Page 3 of 7 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 41 00591 - OREGON CITY SOUTH FORK WATER BOARD PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 41 00187 · CLACKAMAS RIVER WATER · CLACKAMAS

Agricultural/Forest Land Uses Total In Total In Relative Lower Full Potential Contamination Source Note Risk Level DWPAC3l DWPAC4l Auction Lots (1) Higher 0 0 Boarding Stables (1) Higher 36 36 Confined Animal Feeding Operations (CAFOs) (1) Higher 12 12

Crops • Irrigated (inc. orchards, vineyards, nurseries, (2) Higher 173 173

Crops • Nonirrigated (inc. Christmas trees, grains, grass seed, Lower 200 200 Farm Machinery Repair Moderate 33 33 Grazing Animals (> 5 large animals or equivalenVacre) (1) Higher 133 134 Lagoons/Liquid Wastes (1) Higher 3 3 Land Application Sites (1) Higher 4 4 Managed Forest Land - Broadcast Fertilized Areas Lower 0 0 Managed Forest Land - Clearcut Harvest (< 35 yrs.) Higher 32 37 Managed Forest Land - Partial Harvest (< 10 yrs.) Higher 7 8 Managed Forest Land - Road Density ( > 2 mi./sq. mi.) Moderate 0 0 Pesticide/Fertilizer/Petroleum Storage, Handling, Mixing, & Higher 22 24 Recent Burn Areas (< 10 yrs.) Higher 1 1 Managed Forest Lands - Status Unknown Higher 1 1 Other: Moderate 1 1 Other: Lower 0 1 Other: - Unknown Agriculture Operation Moderate 1 1 Other: Abandoned Stock Nursey Moderate 1 1 Other: Crops - Nonirrigated - Abandoned Christmas Trees Lower 3 3 Other: Deciduous Woodland Lower 1 1 Other: Feed Store Lower 1 1 Other: Fish Hatchery Higher 2 2 Other: Fish Hatchery Moderate 1 1 Other: Former Christmas Tree Farm Lower 1 1 Other: Land Clearing - No Erosion Control Higher 1 1 Other: Managed Forest Lands 35+ yrs Lower 1 1 Other: Meat I Game Processing Facility Higher 1 1 Other: Old Farm Worker Housing Moderate 1 1 Other: Pond Moderate 1 1 Other: Poultry Slaughter House Higher 2 2 Other: Poultry Slaughter House/Food Processing Facility Higher 1 1

NOTES: Sites and areas Identified In this Table are only potentlal sources of contamination to the drinking water. Environmental contamination Is not likely to occur when contaminants are used and managed properly. (1) - Potential source of m!croblal contamination (2) - Drip Irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray Irrigation (3) - "Lower DWPA" summarizes the tolal number of potential contaminant sources (PCSs) identified in the geographic area providing water to OC·SFWB, NCCWC, and CRW's intakes between the OC·SFWB intake and the upstream intake for Estacada. (4) - "Full DWPA" summarizes all PCSs identified In the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC's intakes).

12/18/2002 Page 4 of 7 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 4100187 · CLACKAMAS RIVER WATER · CLACKAMAS

Agricultural/Forest Land Uses (cont.) Total In Total In Relative Lower Full ' Potential Contamination Source Note Risk Level DWPA< l DWPA(4l Other: Steep Slopes Higher 1 1 Other: Stream Higher 6 6 Other: Stream Lower 3 3 Other: Stream Moderate 7 7 Other: Transitional Timber Lands Lower 6 6 Other: Unknown agricultural operation Moderate 1 1 Other: Unmanaged Christmas trees Lower 1 1 Other: Unmanaged Deciduous Forest Land Lower 1 1 Other: Unmanaged Deciduous Forest Lands Lower 7 7 other: Unmanaged Deciduous Forest Lands & Stream Lower 1 1 other: Unmanaged Forest Lower 1 1 Other: Unmanaged Forest Lands Lower 9 9 Other: Wetland Area Moderate 1 1 other: Wetlands Lower 6 6

NOTES: Sites and areas Identified in this Table are only potentlal sources of contamination to the drinking water. Environmental contamination ls not likely to occur when contaminants are used and managed properly. (1) - Potential source of mlcroblal contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray Irrigation (3) - ulower OWPA" summarizes the total number of potential contaminant sources (PCSs) Identified in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes between the OC-SFWB Intake and the upstream intake for Estacada. (4) - "Full DWPA" summarizes all PCSs Identified In the geographic area providing water to OC-SFWB, NCCWC, and CRW's Intakes (Including the PCSs identified In areas upstream of the Estacada Intake and USFS Timberlake JCC's Intakes).

12/18/2002 Page 5 of 7 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 4100187 ·CLACKAMAS RIVER WATER · CLACKAMAS

Miscellaneous Land Uses Total In Total In Relative Lower Full 14> Potential Contamination Source Note Risk Level DWP 1' DWPA A l Above Ground Storage Tanks - Excluding Water Moderate 10 13 Channel Alterations - Heavy Higher 7 7 Combined Sewer Outfalls (1) Lower 0 0 Stormwater Outfalls (1) Higher 3 3 Composting Facilities (1 ) Higher 2 2 Historic Gas Stations Higher 3 3 Historic Waste Dumps/Landfills (1) Higher 0 0 Homesteads - Rural - Machine Shops/Equipment Maintenance Higher 31 31 Homesteads - Rural - Septic Systems (< 1/acre) (1)(3) Lower 181 181 Injection/Dry Wells, Sumps - Class V UICs (1) Higher 0 0 Kennels (> 20 Pens) (1) Moderate 7 7 Military Installations Higher 1 1 Random Dump Sites Higher 20 20 River Recreation - Heavy Use (inc. campgrounds) (1) Moderate 10 17 Sludge Disposal Areas (1) Higher 5 5 Stormwater Retention Basins (1) Higher 16 16 Transmission Lines - Right-of-Ways Higher 21 24 Transportation - Freeways/State Highways/other Heavy Use Higher 28 29 Transportation - Railroads Higher 7 7 Transportation - Right-Of-Ways - Herbicide Use Areas Higher 1 1 Transportation - River Traffic - Heavy Higher 5 5 Transportation - Stream Crossing - Perennial Higher 61 62 UST - Confirmed Leaking Tanks - DEQ List Moderate 2 2 UST - Decommissioned/Inactive Lower 2 2 UST - Nonregulated Tanks (< 1,100 gals or Large Heating Oil Higher 0 0 UST - Not Upgraded and/or Registered Tanks Moderate 1 1 UST - Upgraded/Registered - Active Lower 1 1 UST - Status Unknown Moderate 12 12 Upstream Reservoirs/Dams Moderate 8 10 Wells/Abandoned Wells Moderate 3 3 Large Capacity Septic Systems (serves > 20 people) - Class V (1) Moderate 27 27 Construction/Demolition Areas Higher 1 1 Other: Higher 0 1 Other: 5 gallon storage containers on-site, contents unknown. Moderate 1 1 Other: Culvert without Fish Barrier Moderate 1 1

NOTES: Sites and areas identified In this Table are only potentlal sources of contamination to the drinking water. Environmental contamination is not likely to occur when contaminants are used and managed properly. (1) - Potentlal source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - "Lower DWPA" summarizes the total number of potential contaminant sources (PCSs) identified in the geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes between lhe OC-SFWB intake and the upslream Intake for Estacada. (4) - "Full DWP/'!' summarizes all PCSs Identified in lhe geographic area providing water to OC-SFWB, NCCWC, and CRW's intakes (including the PCSs identified in areas upstream of the Estacada Intake and USFS Timberlake JCC's intakes).

1 2/18/2002 Page 6017 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 41 00591 -OREGON CITY SOUTH FORK WATER BOARD PWS #4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 4100187 · CLACKAMAS RIVER WATER · CLACKAMAS

Miscellaneous Land Uses (cont.) Total In Total in Relative Lower Full 3 4 Potential Contamination Source Note Risk Level DWPA1 1 DWPA1 1 Other: Land Use Unknown Moderate 1 1 Other: Pipeline Easement Moderate 1 1 Other: Pond Higher 2 2 Other: Pond Lower 23 23 Other: Pond Moderate 9 9 Olher: Pond · lnstream Moderate 1 1 Other: Cell Phone Tower Lower 1 1 other: Culvert Storage Lower 1 1 Other: Heliport serving Mt. Hood NF Sites Moderate 0 1 Other: Power Boal/watercraft fueling area over water Higher 0 1

NOTES: Sites and areas Identified In this Table are only potential sources of contamination to the drinking water. Envlronmental contamination Is not likely to occur when contaminants are used and managed properly. (1) - Po!ential source of microbial con

12/18/2002 Page 7 of 7 \ \ \ \ \ \ \ \ \ \ \

\ \ \ TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

_. ' , ', .- ' - - ·:> ' ··;o-;:\ -<_-,:.--:.·:,,_ . :-- _ -_ :. ; .>;< > '" <:,'·-<·'.�\.-'·: . ·- :·:: __ : - __ .. ·. · < ...... RESIDEN'l'IALJMUNICIPAL·· LAND:·USE$:·· - . •. <,�--::><-: -,-. ·," :" . ·> •. . . _' I . . . . < . ; • . DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW ROI Airport - Maintenance/Fueling Area Spills, leaks, or improper handling of fuels, de-icers, and other H M chemicals during transportation, use, storage and disposal may impact the drinking water supply. R02 Apartments and Condominiums Improper use, storage, and disposal of household and facility L L maintenance chemicals including cleaners, vehicle maintenance products, pool chemicals, pesticides and fertilizers may impact the drinking water supply. Stormwater nm-off or infiltrationmay carry contaminants to drinking water supply. R03 Campgrounds/RV Parks Leaks or spills of automotive fluids or improperly managed L M septic systems and wastewater disposal may impact drinking water supply. Heavy usage along edge of waterbody may contribute to erosion, causing turbidity.

R04 Cemeteries - Pre- 1945 Embalming fluids (forexample, arsenic) and decomposition M L by-products may impact drinking water supply. ROS Drinking Water Treatment Plants Treatn1ent chen1icals and equip1nent 1naintenance 1naterials M M 1nay itnpact groundwater or surface water source. ROG Fire Station Spills, leaks, or improper handling of chemicals and other L L materials during transportation, use, storage and disposal may impact the drinking water supply. R07 Fire Training Facilities Improper use of fuels and other chemicals during fire training M M may impact the drinking water supply.

ROS Golf Courses Over-application or improper handling of pesticides or M M fe rtilizers n1ay in1pact drinking \Vater. Excessive irrigation 1nay cause transport of contan1inants to groundwater or surface water through nmoff. R09 Housing - High Density - > I Improper use, storage, and disposal of household chemicals M M House/0.5 Acres including Cleaners, vehicle n1aintenance products, pool chenllcals, pesticides aud fertilizers may impact the drinking water supply. Storn1\v ater run-off or infiltrationnlay carry contaminants to drinking water supply.

RIO Landfill/Dumps Water percolating through the landfill waste material may H H transport conta111inants to ground\vater or surface \Y ater sunnlv. Rll Lawn Care - Highly Maintained Areas Over-application or improper handling of pesicides or M M fe rti1izers inay in1pact drinking water. Excessive irrigation may cause transport of conta111inants to ground\vater or surface water through runoff.

Oregon Drinking Water Protection Program Page 1 of 9 Rev. 1217199 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW Rl2 Motor Pools Spills, leaks, or improper handling offuels and other M M chemicals from vehicle service aud parking areas may impact the drinking water supply. Stormwater nm-off or iufliltration may carry contaminants to drinking water.

Rl3 Parks Over-application or improper handling of pesticides or M M fertilizers inay impact drinking \Yater. Excessive in·igation n1ay cause transport of conta1ninants to groundwater or surface water tluough nmoff. Heavy usage along edge of waterbody may contribute to erosion, causing turbidity.

Rl4 Railroad Yards/Maintenance/Fueling Spills, leaks, or improper handling of fu els and other H H Areas chen1icals during transportation, u.se, storage and disposal may impact the drinking water supply. Rl5 Schools Over-application or improper handling of cleaning products, L M pesticides or fertilizers used on the school grounds may impact drinking water. Vehicle maintenance wastes may contribute contaminants.

Rl6 Septic Systems - High Density - > If not properly sited, designed, installed, and maintained, H M IfAcre septic systems can impact drinking water. Cumulative effects of 1nultiple systen1s in an area 1nay impact drinking \Vater sunnly. Rl7 Sewer Lines - Close Proximity to PWS If not properly designed, installed, and maintained, se\ver H M lines can impact drinking \Yater, especially adjacent to a waterbody or within the 2-year time-of-travel zone for drinking water wells. Rl8 Utility Stations - Maintenance Spills, leaks, or improper handling of chemicals and other H H Transforn1er Storage materials including PCBs during transportation, use, storage and disposal may impact the drinking water supply. Rl9 Waste Transfer/Recycling Stations Itnproper 1nanagcn1ent of \Yater contacting waste 1naterial M H may impact the drinking water supply. R20 Wastewater Treatn1ent Improper n1anagen1ent of \Vastewater, treatn1ent chemicals, or M H Plants/Collection Stations equipn1ent maintenance materials Inay impact drinking water supply, R50 Others (List) The impacts to this potential contaminant source will be addressed during the enhanced inventory.

Oregon Drinking Water Protection Program· Page 2 of 9 Rev. 1217 /99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

COMMERCIAL I INDUSTRIAL LAND USES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW COi Auto - Body Shops Improper n1anage1nent of vehicle paints, thinners, and prin1er H M products may impact the drinking water supply. C02 Auto - Car Washes Improper management of vehicle wash water may result in M M soaps, oils, greases, and metals itnpacting the drinking water supply. C03 Auto - Gas Stations Spills, leaks, or improper handling of fuels and other materials H M during transportation, transfer, and storage 1nay in1pact the drinking water supply.

C04 Auto - Repair Shops Spills, leaks, or improper handling of automotive fluids, H M solvents, and repair n1aterials during transportation, use, storage and disposal may impact the drinking water supply. cos Boat Services/Repair/Refinishing Spills, leaks, or improper handling of fuels, septage, H H tnaintenance chetnicals, sandblasting \Vastes, paints, and other 1naterials during transportation, use, storage and disposal n1ay impact the drinking water sunnly. C06 Cement/Concrete Plants Spills, leaks, or improper handling of chemicals and high M M turbidity wastewaters during transportation, use, storage and disposal may impact the drinking water supply. C07 Chemical/Petrolemn Spills, leaks, or improper handling of chemicals and other H H Processing/Storage materials during transportation, use, storage and disposal may impact the drinking water supply.

C08 Dry Cleaners Spills, leaks, or improper handling of dry cleaning solvents H M and other chen1icals during transportation, use, storage and disposal may impact the drinking water supply.

C09 Electrical/Electronic Manufacturing Spills, leaks, or improper handling of chemicals and other H M n1aterials during transportation, use, storage, and disposal 111ay impact the drinking water supply. CIO Fleetffrucking/Bus Terminals Spills, leaks, or improper handling of fuels, grease, solvents, H M and other n1aterials fron1 vehicle service, fueling, and parking areas may impact the drinking water supply. Cl l Food Processing Spills, leaks, or improper handling of chemicals and other M M inaterials during transportation, use, storage and disposal 111ay impact the drinking water supply.

CJ2 Furniture/Lumber/Parts Stores Spills, leaks, or improper handling of hazardous chemical M M products and other materials in inventory during transportation, use, storage and disposal n1ay impact the drinking water supply. Cl3 Home Manufacturing (modular) Spills, leaks, or improper handling of chemicals and other H H n1aterials during transportation, use, storage and disposal may impact the drinking water supply.

Oregon Drinking Water Protection Program Page 3 of 9 Rev. 12ni99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW C14 Junk/Scrap/Salvage Yards Spills, leaks, or improper handling of automotive chemicals, H H batteries, and other waste materials during storage and disposal may impact the drinking water supply.

C15 Machine Shops Spills, leaks, or improper handling of solvents, metals, and H H other chemicals or materials during transportation, use, storage and disposal may impact the drinking water supply. Cl6 Medical/Vet Offices Spills, leaks, or improper handling ofx-ray, biological, M L chemical, and radioactive wastes and other 1naterials during transportation, use, storage and disposal may impact the drinking water supply, C17 Metal Plating/Finishing/Fabrication Spills, leaks, or improper handling of solvents and other H H che1nicals during transportation, use, storage and disposal may impact the drinking water supply.

Cl8 Mines/Gravel Pits Spills, leaks, or improper handling of chemicals and wastes H H generated in ntlning operations or fron1 heavy equipinent may impact the drinking water supply. Cl9 Office Buildings/Complexes Spills, leaks, or improper handling of chemicals and other L L materials stored and used in maintenance or from parking areas may impact the drinking water supply.

C20 Parking Lots/Malls - > 50 Spaces Spills and leaks of automotive fluids in parking lots may H H impact the drinking water supply.

C21 Photo Processing/Printing Spills, leaks, or improper handling of photographic chemicals H H during transportation, use, storage and disposal tnay itnpact the drinking water supply.

C22 Plastic/Synthetics Producer Spills, leaks, or improper handling of solvents and resins H H during transportation, use, storage and disposal may impact the drinking water supply.

C23 Research Laboratories Spills, leaks, or improper handling of laboratory chemicals H H and \Vastes during transportation, use, storage and disposal may impact the drinking water supply. C24 RV/Mini Storage Spills, leaks, or improper handling of automotive fluids and L L other 1naterials during transportation, storage and disposal may impact the drinking water supply.

C25 Wood/Pulp/Paper Processing and Mills Spills, leaks, or improper handling of chemicals and other H H materials during transportation, use, storage and disposal may impact the drinking water supply.

C26 Wood Preserving/Treating Spills, leaks, or improper handling of wood preservatives and H H other che1nicals during transportation, use, storage and disposal may impact the drinking water supply. C50 Others (List) Spills, leaks, or improper handling of chemicals and other materials during transportation, use, storage, and disposal 1nay impact the drinking water supply. -

Oregon Drinking Water Protection Program Page 4 of9 Rev. 1217/99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

AGRICULTURAL I FOREST LAND USES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW AO! Auction Lots Improper storage and n1anage1nent of anin1al wastes and H H wastewater in areas of concentrated livestock may impact drinking water. A02 Boarding Stables Improper storage and management of animal wastes and M H wastewater in areas of concentrated livestock may impact drinking water. A03 Confined Animal Feeding Operations In1proper storage and manage1nent of anin1al \Vastes and H H (CAFOs) \Vastewater in areas of concentrated livestock may impact drinking water. A04 Crops - Irrigated - Berries, Hops, Mint, Over-application or improper handling of pesticides or M* H Orchards, Vineyards/Nurseries, Green fe rtilizers tnay itnpact drinking water. Excessive irrigation Houses, Vegetables, etc. may cause transport of conta1ninants or sedin1ents to groundwater/surface water through runoff. NOTE: *Drip- irrigated crops such as vineyards and some vegetables, are considered to be a low risk. A05 Crops - Nonirrigated - Christmas Over-application or improper handling of pesticides or L L Trees, Grains, Grass Seeds, Hay, fertilizers may impact drinking water. Some agricultural Pasture practices may result in excess sediments discharging to surface \Vaters, but non-irrigated crops are generally considered to be a low risk to groundwater and surface water.

A06 Fann Machinery Repair Spills, leaks, or improper handling of solvents and petroleum H M products during transportation, use, storage and disposal 1nay impact the drinking water supply.

A07 Grazing Animals - > 5 Large Animals Improper storage and management of animal wastes may M H or Equivalent/Acre impact drinking water supply. Conce1itrated livestock may contribute to erosion and seditnentation of surface \Valer bodies. A08 Lagoons/Liquid Wastes Itnproper seepage or overflo\vs of liquid wastes may itnpact H H the drinking water supply. A09 Land Application Sites Itnproper 1nanage1nent of sludge and \Vaste\vater n1ay itnpact M H drinking water supply. AIO Managed Forest Lands - Broadcast Over-application or improper handling of pesticides or L M Fertilized Areas fe rtilizers n1ay in1pact the drinking water source.

Al 1 Managed Forest Lands - Clearcut Cutting and yarding of trees may contribute to increased M H Harvested - < 35 yrs erosion, resulting in turbidity and chemical changes in drinking water supply. Over-application or improper handling of pesticides or fertilizers may itnpact drinking water source.

Oregon Drinking Water Protection Program Page 5of 9 Rev. 1217/99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW Al2 Managed Forest Lands - Partial Cutting and yarding of trees may contribute to increased M H

Harvested - <10 yrs erosion, resulting in turbidity and chemical changes (ex:nitrates) in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking \Vater source. Al3 Managed Forest Lands - Road Density Road building, maintenance, and usage may contribute to M H - > 2 mi/sq mi erosion and slope failure causing turbidity in drinking water supply. Vehicle usage increases the risks ofleaks or spills of petroleum products and other hazardous materials.

Al4 Pesticide/Fertilizer!Petroleum Storage, Leaks, spills and improper handling of pesticides, fertilizers H H Handling, Mixing, & Cleaning Areas and petroleu1n products may impact drinking water source.

Al5 Recent Burn Areas - < 10 yrs Vegctation reinoval by fire 1nay increase surface erosion and L H sediment delivery rates, resulting in high turbidity in drinking water source. ASO Others (List) The impacts of this potential contaminant source will be addressed during the enhanced inventory.

Oregon Drinking Water Protection Program Page 6 of 9 Rev. 1217/99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

MISCELLANEOUS LAND USES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW MO! Above Ground Storage Tanks Spills, leaks, or improper handling of stored materials may M M impact the drinking water supply.

M02 Channel Alterations - Heavy Constntction or maintenance of channel tnay cause erosion, L H resulting in increase in turbidity of surface water. Improper stream alterations 1nay also contribute to increase in potential for flooding. M03 Combined Sewer Outfalls Con1bined sewer overflo\vs contribute untreated wastewater at L H the outfall.

M04 Stormwater Outfalls Stonn\vater nut-off n1ay contain contan1inants front L H residential (homesites and roads), commercial/industrial, and agricultural use areas. MOS Composting Facilities Storage and improper handling of organic material, animal M H waste, and \Vaste,vater n1ay impact drinking \Y ater.

M06 Historic Gas Stations Historic spills, leaks, or improper handling of solvents and H H petroleum products may impact the drinking water supply. Abandoned underground storage tanks may be present.

M07 Historic Waste Dumps/Landfills Water percolating through old landfills or dump sites may H H transport contantinants to groundwater or surface \Yater supply. MOS Homesteads - Rural - Machine Shops Spills, leaks, or improper handling of solvents, fu els, and H H other n1aterials or chen1icals during transportation, use, storage and disposal may impact the drinking water supply.

M09 Homesteads - Rural - Septic Systems < If not properly sited, designed, installed, and maintained, L L I/Acre septic systems can impact drinking water. Use of drain cleaners and dumping household hazardous wastes can result in groundwater contamination.

MIO Injection Wells/Drywells/Sumps - Shallow injection wells may transport untreated wastewater H M Class VUICs (process or storn1 \Vater) directly into groundwater and itnpact drinking water. Mil Kennels - > 20 Pens Improper storage, n1anagen1ent, and disposal of anitnal \Vastes L M and wastewater in areas of concentrated anitnals tnay itnpact drinking water. M12 Military Installations Spills, leaks, or improper handling of chemicals and other H H materials during transportation, use, storage and disposal n1ay impact the drinking water supply. May also contain ordnance or waste landfills/dump sites, as well as other potential contaminant sources. Ml3 Random Dumpsites Illegal trash and debris containing chemicals and hazardous M H 1naterials 1nay cause contamination to ground\vater or surface water supply.

Oregon Drinking Water Protection Program Page 7 of 9 Rev. 1217/99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW Ml4 River Recreation - Heavy Use Inadequate disposal of human wastes may conh·ibute bacteria L M and nutrients to the drinking water supply. Heavy use may contribute to streambank erosion causing turbidity. Fuel spills and emissions 1nay also contribute to contamination of the drinking water supply. MIS Sludge Disposal Areas Improper management of sludge and wastewater may impact M H drinking water supply.

Ml6 Stonnwater Retention Basins Stormwater nm-off may contain a wide variety of M H conta1ninants front residential, comn1ercial/industrial, and agricultural use areas. Ml7 Transmission Lines - Right-of-Ways Construction and corridor n1aintenance inay contribute to L H increased erosion and turbidity in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water supply.

Ml8 Transportation Corridors - Vehicle usage increases the risks for leaks or spills offuels M H Freeways/State Highways and other hazardous materials that may impact drinking water. Road building, maintenance, and usage may contribute to increased erosion and slope failure causing turbidity in drinking water source. Over-application or improper handling of pesticides or fertilizers may impact the drinking water supply, Ml9 Transportation Corridors - Railroads Rail transport increases the risks forleaks or spills of fuels M H and other hazardous inaterials that 1nay in1pact drinking \Vater. Installation and maintenance of tracks may contribute to increased erosion and slope failure causing turbidity in drinking water source. Over-application or improper handling of pesticides adjacent to tracks may impact the drinking water supply. M20 Transportation Corridors - Right-of- Over-application or improper handling of pesticides may M H Ways - Herbicide Use Areas impact drinking water supply. M21 Transportation Corridors - River Heavy river usage n1ay contribute to riverbank erosion and L H Traffic - Heavy increased hirbidity in drinking water supply. Fuel and other chemical leaks, spills and emissions may also contribute to drinking \Yater conta1nination.

M22 Transportation Corridors - Strean1 Road building, maintenance, and usage nlay contribute to L H Crossing - Perennial erosion and slope failure causing turbidity in drinking water source. Vehicle usage increases the risks ofleaks or spills of fuels and other chemicals in highly sensitive areas. Over- application or improper handling of pesticides in right-of-way tnay also itnpact drinking \Vater source. M23 UST - Confirmed Leaking Tanks - Existing contatnination fr on1 spills, leaks, or itnproper H M DEQ List handling of stored materials may impact the drinking water supply. M24 UST - Deconirllissioned Historic spills or leaks may impact the drinking water supply. L L

Oregon Drinking Water Protection Program Page 8of9 Rev. 1217/99 TABLE 2. POSSIBLE WATER QUALITY IMPACTS FOR POTENTIAL CONTAMINANT SOURCES

DEQ TYPE OF ACTIVITY POTENTIAL WATER QUALITY IMPACTS Risk Risk PCS to to CODE GW SW M25 UST - Non-Regulated Tanks - < 1,100 Spills, leaks, or improper handling of stored materials may H M gals impact the drinking water supply. M26 UST - Not Yet Upgraded or Registered Spills, leaks, or improper handling of stored materials may H M Tanks impact the drinking water supply. M27 UST - Upgraded and/or Registered - Spills or improper handling during tank filling or product L L Active distribution may impact the drinking water supply. M28 UST - Status Unknown Spills, leaks, or improper handling of stored materials may H M impact the drinking water supply.

M29 Upstream Reservoirs During n1ajor storn1 events, reservoirs n1ay contribute to L M prolonged turbidity for downstream intakes for drinking water. Construction, fluctuating water levels, and heavy waterside use can increase erosion and turbidity in reservoir/drinking water source. M30 Wells/Abandoned Wells Improperly installed or maintained wells and abandoned wells H M n1ay provide a direct conduit for contamination to groundwater and drinking water source.

M31 Large Capacity Septic Systems -Class If not properly sited, designed, installed; and maintained, H M V UIC (serves >20) septic systems can impact drinking water. M50 Others (List) The impacts of this potential contaminant source will be addressed during the enhanced inventory.

Oregon Drinking Water Protection Program Page 9 of 9 Rev. 1217/99

TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY · SOUTH FORKW B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location CUy Listing Areas (1) Potential Impacts Comments

Homesteads - residential on between Forsythe and Clackamas Field- Within Lower If not properly sited, designed, installed. and Rural - Septic septic systems Carver on Clackamas Co Observation sensitive maintained, septic systems can impact 1 + acre homesteads in flood Systems (< 1/acre} River Drive (CRD) {unincorp) area. for water. Use ofdrain cleaners and drinking plain. CLACKAMAS dumping household hazardous wastes can RIVER result in groundwater contamination.

2 Transportation - Clackamas River road through DWPA. Clackamas Field- Within Higher Vehicle use increases the risk for leaks or Freeways/State Drive Co Observation sensitive spills of fuel & other haz. materials. Road Steep forested slopes. Highways/Other (unincorp) area. for building, maintenance & use can increase Heavy Use Roads CLACKAMAS erosion/slope failure causing turbidity. Over- RIVER application or improper handling of pesticides/fertilizers may impact water.

3 Drinking Water South Fork Water 13074 CRD Clackamas Field- Within Moderate Treatment chemicals and equipment Treatment Plants Board Intake Co Observation sensitive maintenance materials may impact {unincorp) area. for groundwater or surface water source. CLACKAMAS RIVER

4 Boarding Stables boarding stable ? 14135 CRD Clackamas Field- Within Higher Improper storage and management of animal Co Observation sensitive wastes and wastewater in areas of Approximately 1 O acres. (unincorp) area. for concentrated livestock may impact drinking CLACKAMAS water. RIVER

Grazing Animals (> Higher Improper storage and management of animal 5 large animals or wastes may impact drinking water supply. Approximately 10 acres. equivalent/acre) Concentrated livestock may contribute to erosion and sedimentation of surface water bodies.

5 River Recreation - Main Stem of through DWPA Clackamas Field� Within Moderate Inadequate disposal of human wastes may Heavy Use (inc. Clackamas River Co Observation sensitive contribute bacteria and nutrients tothe campgrounds) {unincorp) area. for drinking water supply. Heavy use may CLACKAMAS contribute tostreambank erosion causing RIVER turbidity. Fue! spills and emissions may also contribute tocontamination.

Note: Sites and areas identified In this Table are only potential sourcesof contamination to the drinking water. Envlronmental contamination Is not likely to occur when contaminantsare used and managed properly.

(1) Where multiple potential contaminant sources existat a site, the highest level of risk Is used.

Thls Inventory was completed by tho public water system's staff and volunteers In accordance with Orogon Source Water Assessment Plan methods.

1/812003 Page 1 ofS TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY- SOUTH FORKW B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

6 Crops - Irrigated Serres Nursery Forsythe Rd. between S. Clackamas Field Outside Higher Over-application or improper handling of (inc. orchards. Highland Rd. and Hunter Co Observation sensitive pesticides/fertilizers may impact drinking Farm equipment vineyards, nurseries, Ave. (unincorp) areas. for water. Excessive irrigation may transport greenhouses) CLACKAMAS contaminants or sediments to RIVER groundwater/surface water through runoff. Drip-irrigated crops are considered to be a low risk.

7 Homesteads - residential on Forsythe Rd. Clackamas Field Within Lower !f not properly sited, designed, installed, and Rural - Septic septic systems Co Observation sensitive maintained. septic systems can impact Systems(< 1/acre) (unincorp) area. for drinking water. Use of drain cleaners and CLACKAMAS dumping household hazardouswastes can RIVER result in groundwater contamination.

8 Other slide area Forsythe Rd. between S. Clackamas Field Within Higher The impacts of this potential contaminant Highland Rd. and Hunter Co Observation sensitive source wi!l be addressed during the Slide area at the end of Swan Ave. (unincorp) area. for enhanced inventory. Ave. CLACKAMAS RIVER

9 Lawn Care - Highly residential at end of Edgewater Street Gladstone Reid Justoutside Moderate Over-application or improper handling of MaintainedAreas Observation DWPAfor pesticides or fe rtilizers may impact drinking New subdivision and older CLACKAMAS Excessive irrigation may cause water. residential area. RIVER transport of contaminants to groundwater or surfacewater through runoff. Site is located beyond DWPA but it may impact the DWPA.

Housing - High Moderate Improper use, storage, and disposal of Density (> 1 household chemicals may impact the drinking New subdivision and older House/0.5 acres) water supply. Stormwater run-off or infiltration residential area. may carry contaminants to drinking water supply. Site is located beyond DWPA but it may impact the DWPA.

Note: Sites and areas identified in this Table are only potential sources ofcontaminauon to the drinking water. Environmental contaminaUon Is not likely to occurwhen contaminants are used and managed properly.

(1) Where mu!Uple potenUal contaminant sources exlst at a site, the highest level of risk Is used.

ThlS Inventory was completed by the public water system's staff and voluntoors in accordance with Oregon Sourco Water Assessment Plan methods.

1/812003 Page 2 of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY- SOUTH FORK W B

Reference Potential Proximityto Relative No. Contaminant Approximate Method for Sensitlve Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

10 Transportation - Southern Pacific parallel to Clackamas River Gladstone Field- Within Higher Rail transport elevates the risk for leaks/spills Railroads Railroad Observation sensitive of fuel & other haz. materials. area. for Installation/maintenance oftracks may CLACKAMAS increase erosion & slope failure causing RIVER turbidity. Over-application/improper handling of pesticides may impactthe water supply.

11 Housing - High residential Evergreen Lane Gladstone Field- Within Moderate Improper use, storage, and disposal of Density (> 1 Observation sensitive household chemicals may impact the drinking House/0.5 acres) area. for water supply. Stormwater run-off or infiltration CLACKAMAS may carry contaminants to drinking water RIVER supply.

12 RV/Mini Storage Oregon Self 660 SE 82nd Drive Gladstone Field- Within Lower Spills, leaks. or improper handling of Storage Observation sensitive automotive fluidsand other materials during RV and personal property area. for transPortation, storage and disposal may storage facility. CLACKAMAS impact the drinking water supply. RIVER

13 Parking Lots/Malls Clackamas River 790 SE 82nd Drive Gladstone Field- Within Higher Spills and leaks of automotive fluids in (> 50 Spaces) Club Observation sensitive parking lots may impact the drinking water area. for supply. CLACKAMAS RIVER

14 Campgrounds/RV Holly View Court 1180 SE 82nd Drive Gladstone Field- Within Moderate Leaks or spills of automotive fluids or Parks Observation sensitive improperly managed septic systems and Small mobile home park. area. for wastewater disposal may impact drinking CLACKAMAS water supply. Heavy usage along edge of RIVER waterbody. may contribute to erosion, causing turbidity.

Note: Sites and areas Identified in this Table are only potential sources ofcontamination to the drtnklng water. Environmental contamination is not !Jkely to occur when contaminants are used and managed property.

(1) Where multiple potential contaminant sources exist at a Site, the highest level of rtsk is used.

This Inventory was completed by the public wator system's staff and volunteers In accordance with Oregon Source Water Assessment Plan methods.

1/8/2003 Page 3 of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY- SOUTH FORK W B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

18 River Recreation - Main Stem of through DWPA Clackamas Field- Within Moderate Inadequate disposal of human wastes may Heavy Use (inc. Clackamas River Co Observation sensitive contribute bacteria and nutrients tothe campgrounds) (unincorp) area. for drinking water supply. Heavy use may CLACKAMAS contribute to streambank erosion causing RIVER turbidity. Fuel spills and emissions may also contribute to contamination.

22 Homesteads - residential on Highland Rd. Clackamas Field- Outside Lower lf not properly sited, designed, installed, and Rural - Septic septic systems Co Observation sensitive maintained, septic systems can impact Systems (< 1/acre) (unincorp) areas. for drinking water. Use of drain cleaners and CLACKAMAS dumping household hazardouswastes can RIVER result in groundwater contamination.

24 Machine Shops Maxwell Mold and 960 SE 82nd Drive Gladstone Field- Within Higher Spills. leaks, or improper handling of Machine Shop Observation sensitive solvents, metals, and other chemicals or area. for materials during transportation, use. storage CLACKAMAS and disposal may impact thedrinking water RIVER supply.

Other Cell Phone Lower The impacts of this potential contaminant Tower source will beaddressed during the enhanced inventory.

25 Fleetrrrucking/Bus Gladstone School north of Wheeler Ct. Gladstone Field- Within Moderate Spills. leaks, or improper handling of fuels. Tenninals Bus Station Observation sensitive grease, solvents, and other materials from area. for vehicle service, fueling, and parking areas CLACKAMAS may impact the drinkingwater supply. RIVER

26 Automobiles - Body R & R Automotive 1250 SE 82nd Drive Gladstone Field- Within Moderate Improper management of vehicle paints, Shops Observation sensitive thinners, and primer products may impact the area. for drinking water supply. CLACKAMAS RIVER

Note: Sites and areas Identified Jn this Table are only potentlal sources of contamnatlon to the dnnking water. Environmental contamination Is not likely to occurwhen contaminants are used and managed properly.

(1) Where multiple potential contaminant sources exist at a site. the highest level of rtsk is used.

This Inventory was completed by the publie water system's staff and volunteers In accordance with Oregon Source Water Assessment Plan methods.

11812003 Page 4 of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANTSOURCES

PWS# 4100591 OREGON CITY- SOUTH FORKW B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

27 Other Warehouse Classic Pool and 17875 SE 82nd Drive Gladstone Field- Within Lower Spills, leaks, or improper handling of Spa Observation sensitive chemicals and other materials during area. for transportation, use, storage, and disposal CLACKAMAS may impact the drinking water supply. RIVER

28 Other Unknown Riggers 17865 SE 82nd Drive Gladstone Field- Within Moderate Spills, leaks, or improper handling of Business Type Observation sensitive chemicalsand other materials during Potential risk should beverified area. for transPortation, use. storage. and disposal during enhanced inventory. CLACKAMAS may impact the drinking water supply. RIVER Unknown operations - needs verification.

29 Office West Coast 17855 thru 17765 SE 82nd Gladstone Field- Within Lower Spills, leaks. or improper handling of Buildings/Complexes Screen Printing Drive Observation sensitive chemicals and other materials stored and and various retail area. for used in maintenance or from parking areas businesses CLACKAMAS may impact the drinking water supply. RIVER

Parking Lots/Malls Higher Spills and leaks of automotive fluids in (> 50 Spaces) parking lots may impact the drinking water supply.

Photo Higher Spills, leaks, or improper handling of Processing/Printing photographic chemicals during transportation, use, storage and disposal may impact the drinking water supply.

' 30 Parking Lots/Malls RV & Auto Storage across street fonn West Gladstone Field- Within Higher Spills and leaks of automotive fluids in (> 50 Spaces) Coast Screen Printing Observation sensitive parking Jots may impact the drinking water area. for supply. CLACKAMAS RIVER

Note: Sites and areas identifled in th!s Table are only potential sources ofcontamination to the drinking water. Envlronmental contamination Is not Hkely to occur when contaminants are used and managed properly.

(1) Where multiple potential contaminant sources eXistat a site. the highest level ofrisk Is used .

This Inventory was completed by the public wator system's staffand volunto-Ors In accordance with Oregon Source Water Assessment Plan methods.

1/812003 Page 5 of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY- SOUTH FORKW B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing A>"eas (1) Potential Impacts Comments

31 Crops - Irrigated small crops- bet\.veen Edgewater Rd. Gladstone Field- Within Higher Over..app!ication or improper handling of {inc. orchards, irrigated and RV & Auto Storage Observation sensitive pesticides/fertilizers may impact drinking vineyards, nurseries. facility area. for water. Excessive irrigation may transport greenhouses) CLACKAMAS contaminants or sediments to RIVER groundwater/surface water through runoff. Drip.irrigated crops are considered to bea low risk.

32 Housing - High residential Casa Blanca Ct Clackamas Field- Within Moderate Improper use, storage, and disposal of Density(> 1 Co Observation sensitive household chemicals may impact the drinking House/0.5 acres) (unincorp) area. for water supply. Stormwater run-off or infiltration CLACKAMAS may carry contaminants to drinking water RIVER supply.

33 Housing - High Clackamas SE Dean Drive Clackamas Field- Within Moderate Improperuse, storage, and disposal of Density (> 1 Residential Park Co Observation sensitive household chemicals may impact the drinking House/0.5 acres) (unincorp) area. for water supply. Stormwater run-off or infiltration CLACKAMAS may carry contaminants to drinking water RIVER supply.

34 Housing - High residential Tiffany Ct Clackamas Field- Outside Moderate Improperuse. storage, and· disposal of Density(> 1 Co Observation sensitive household chemicals may impact the drinking House/0 .5 acres) (unincorp) areas. for water supply. Stormwater run-off or infiltration CLACKAMAS may carry contam'inants to drinking water RIVER supply.

35 Apartments and Briar Wood Town SE 82nd Drive Clackamas Field- Within Lower Improper use, storage. and disposal of Condominiums Homes Co Observation sensitive household and facility maintenance (unincorp) area. for chemicals may impact the drinking water CLACKAMAS supply. Stormwater run-off or infiltration may RIVER carry contaminants to water supply.

Note: Sites and sreas identified in th!s Table are only potential sourcesof contamlnatlon to the dr1nklng water. Envlronmental contamination Is not likely to occurwhen contamlnants are used and managed properly.

(1) Where mu!Uple potentl<:il contaminant sources exist at a site, the highest level of risk Is used.

This Inventory was completed by the public water system's staff and volunteers In accordance withOregon Source Water Assessment Plan methods.

1/812003 Page 6of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY- SOUTH FORK W B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

30 Parking Lots/Malls Harmony Road 17300 SE 82nd Drive Clackamas Field- Within Higher Spills and leaks of automotive fluids in (> 50 Spaces) Music Co Observation sensitive parking lots may impact the drinking water (unincorp) area. for supply. CLACKAMAS RIVER

Office Lower Spills, leaks. or improper handling of Buildings/Complexes chemicals and other materials stored and used in maintenance or from parking areas may impact the drinking water supply.

37 Parking Lots/Malls Village Place 9100 SE Scottstree Way Clackamas Fie!d- Within Higher Spi!ls and leaks of automotive fluids in (>so Spaces} Co Observation sensitive parking lots may impact the drinking water Large apartment complex. (un·incorp) area. for supply. CLACKAMAS RIVER

Apartments and Lower Improper use, storage, and disposal of Condominiums hous hold and cmty maint na ce � :a � � Large apartment complex. chemicals may impact the dnnkmg water supply. Stormwater run-off or infiltration may carry contaminants to water supply.

Note: Sites and areas identified In this Table are only potential sources of contamlnatlon to the drinking water. Envlronmental contaminatlon Is not likely to occurwhen contarnJnantsare used and rnanageo' properly.

(1) Where multiple potentlal contaminant sources eidstat a site, the highest level of risk ls useo'.

This Inventory was completed by the public water system's staff and volunteers In accordance with Oregon Source Water Assessment Plan methods.

1!8/2003 Page 7 of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY - SOUTH FORK W B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk level Source Type Name Location City Listing keas (1) Potential Impacts Comments

38 Fleet/Trucking/Bus Safeway complex SE 82nd and Jennifer St Clackamas Field- Within Moderate Spi!Js, leaks. or improper handling offuels, Terminals Co Observation sensitive grease, solvents, and other materials from {unincorp) area. for vehicle service, fueling, and parking areas CLACKAMAS may impact the drinking water supply. RIVER

Food Processing Moderate Spills, leaks. or improper handling of chemicals and other materials during transportation, use, storage and disposal may impact the drinking water supply.

Office Lower Spills, leaks. or improper handling of Buildings/Complexes chemicals and other materials stored and used in maintenance or from parking areas may impact the drinking water supply.

Parking Lots/Malls Higher Spills and leaks of automotive fluids in (> 50 Spaces) parking lots may impact the drinking water supply.

41 Office retail businesses SE 82nd Drive. between Clackamas Field- Within Lower Spills, leaks. or improper handling of Buildings/Complexes and office Hwy 212 and SE 82nd Dr. Co Observation sensitive chemicals and other materials stored and complexes (unincorp) area. for used in maintenance or from parking areas CLACKAMAS may impact the drinking water supply. RIVER

Transportation - Higher Vehicle use increases the risk for leaks or Freeways/State spills of fuel & other haz. materials. Road Highways/Other building, maintenance & use can increase Heavy Use Roads erosion/slope failure causing turbidity. Over- application or improper handling of pesticides/fertilizers may impactwater.

42 waste Street Sweeper Jennifer St and Evelyn St Clackamas Field- Within Higher Improper management of water contacting Transfer/Recycling Recycle Co Observation sensitive waste material may impact the drinking water Stations (unincorp) area. for supply. CLACKAMAS RIVER

Note: SJtes and areas identified In this Table are only potential sources of contamlnaUon to the drinking water. Environmental contaminauon is not likely to occur when contarrUnants are used and managed properly.

(1) Where multiple potenUal contaminant sources exlstat a site, the highest level of risk is used.

This Inventory was completed by tho public water system's staff and volunteers In accordance with Oregon Source Water Assessment Plan methods.

1/8/2003 Page a of9 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100591 OREGON CITY - SOUTH FORK W B

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

43 Office Oregon 17330 SE Evelyn St Clackamas Field- Within Lower Spills, leaks, or improper handling of Buildings/Complexes Department of Co Observation sensitive chemicals and other materials stored and Potential risk should beverified Fish and Wildlife (unincorp) area. for used in maintenance or from parking areas during enhanced inventory. regional office CLACKAMAS may impact the drinking water supply. RIVER

Other Fish Research Moderate Spills. leaks, or improper handling of chemicals and other materials during Potential risk should be verified transportation, use, storage, and disposal during enhanced inventory. may impact the drinking water supply.

44 Utility Stations - P.G.E. Substation Evelyn Street Clackamas Field- Within Higher Spills, leaks, or improper handling of Maintenance Co Observation sensitive chemicals and other materials induding Electrical powersubstation. Transformer (unincorp) area. for PCBs during transportation, use, storage and Storage CLACKAMAS disposal may impact the drinking water RIVER supply.

Note: Sites and areas identified in this Table are only potential sources of contamination tothe drlnklng water. Environmental contamination is not !Jkely to occurwhen contaminants are used and managed properly.

(1) Where multiple potential contaminant sources eXist at a site, the highest level of risk Is used.

This Inventorywas complotod by the publlc water system's staff and volunteers In accordance with Oregon Source Water Assessment Plan methods.

1/812003 Page 9 of9 I I I I I \ \ \ \ TABLE3. INVENTORY RESULTS -LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100580 North Clackamas Co. Wtr Com. (former Oak Lodge WO}

Reference Potential Proximity to Relative No. Contaminant Approximate Method for SensitiVe Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

15 Drinking Water North Clackamas 14275 Clackamas River Clackamas Field- Within Moderate Treatment chemicals and equipment Treatment Plants County Water Drive Co Observation sensitive area. maintenance materials may impact 10 acres. Commission (unincorp) groundwater or surfacewater source.

16 Homesteads - residential on between Forsythe and Clackamas Field- Within Lower !f not properly sited, designed. installed, and Rural - Septic septic systems Carver on Clackamas Co Observation sensitive area. maintained, septic systems can impact Approximately 1 acre in flood Systems (< 1/acre) River Drive (unincorp) drinking water. Use of drain cleaners and plain. dumping household hazardous wastes can result in groundwater contamination.

17 Transportation - Clackamas River through DWPA Clackamas Field- Within Higher Vehicle use increases the risk for leaks or Freeways/State Drive Co Observation sensitive area. spills of fuel & other haz. materials. Road Steep forested slope on south Highways/Other (unincorp) building, maintenance & use can increase side. Heavy Use Roads erosion/slope failure causing turbidity. Over- application or improper handling of pesticides/fertilizers may impact water.

19 Transportation - Clackamas River through DWPA Clackamas Field- Within Higher Vehicle use increases the risk for leaks or Freeways/State Drive Co Observation sensitive area. spills of fuel & other haz. materials. Road Highways/Other (unincorp) building, maintenance & use can increase Heavy Use Roads erosion/slope failure causing turbidity. Over- application or improper handling of pesticideslfertilizers may impact water.

20 Homesteads - residential on Forsythe Rd. between Clackamas Field- Within Lower If not properly sited, designed, installed, and Rural - Septic septic systems Brunner Rd. and Highland Co Observation sensitive area. maintained, septic systems can impact Systems(< 1/acre) Rd. (unincorp) drinking water. Use of drain cleaners and dumping household hazardous wastes can result in groundwater contamination.

21 Crops - Irrigated Nursery 14703 Forsythe Rd. Field- Within Higher Over-application or improper handling of Qnc. orchards, Observation sensitive area. pesticides/fer tilizers may impact drinking Appears abandoned, location vineyards, nurseries, water. Excessive irrigation may transport should be verified. greenhouses) contaminants or sediments to groundwater/surface water through runoff. DriP-irrigated crops are considered to be a low risk.

Note: Sites and areas identified !n this Table are only potential sources of contamination to the drinking water. Environmental contamination ts not likely to occur when contaminants are used and managed properly.

(1) Where multiple potential contaminantsources exist at a site. the highest level of risk Is used.

This Inventory was completed by the publlc water system's staff and volunteers In accordance with Orogon Sourco Water Asses

1/8/2003 Page 1 of4 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100580 North Clackamas Co. Wtr Com. (former Oak Lodge WO)

Reference Potential Proximity to Relative No. Contaminant Approximate Method for SensitiVe Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

23 Managed Forest Managed Forest Highland Rd. Clackamas Field Within Higher Cutting and yarding of trees may contribute to Land - Clearcut Lands Co Observation sensitive area. increased erosion, resulting in turbidityand Harvest (< 35 yrs.) (unincorp) chemical changes in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water source.

39 Metal Mark's Metal 10300 SE Jennifer St Clackamas Field- Within Higher Spills, leaks. or improper handling of Plating/Finishing/Fab Technology Co Observation sensitive area. solvents, metals, and other chemicals during Manufacturing. rication (unincorp} transportation. use, storage and disposal may impact the drinking water supply.

40 Office Clackamas Station 10315 SE Jennifer St. Clackamas Field- Within Lower Spills, leaks, or improper handling of Buildings/Complexes Co Observation sensitive area. chemicals and other materials stored and Garden Distribution NW. Ameri (unincorp) used in maintenance or from parking areas Source, Maco Wood Products. may impact the drinking water supply.

Furniture/Lumber/Pa Moderate Spills, leaks, or improper handling of rtsStores hazardous chemical products and other Garden Distribution NW, Ameri materials in inventory during transportation, Source, Maco Wood Products. use, storage and disposal may impact the drinking water supply.

Parking Lots/Malls Higher Spills and leaks of automotive fluids in (> 50 Spaces) parking !ots may impact the drinking water Garden Distribution NW, Ameri supply. Source, Maco Wood Products.

Fleet/Trucking/Bus Moderate· Spills. leaks. or improper handling of fuels, Terminals grease, solvents. and other materials from Garden Distribution NW, Ameri vehicle service, fueling, and parking areas Source. Maco Wood Products. may impact the drinking water supply.

Note: Sites and areas Identified Jn this Table are only potential sources of contammatJon to the dnnking water. Environmental contamination ls not likely to occur when contaminants are used and managed properly.

(1) Where multiple potentlal contaminant sources exist at a site, the highest level Ofr!Sk ls used.

Thi$ Jnventorywas completed by the publlc water systom'$ 5taff and voluntoors In accordance with Oregon Source Water Asses

1/8/2003 Page 2 Of4 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100580 North Clackamas Co. Wtr Com. (former Oak Lodge WO)

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

45 Parking Lots/Malls Riverside County Water Ave. Clackamas Field- Within Higher Spills and leaks of automotive fluids in (> 50 Spaces) Park Co Observation sensitive area. parking lots may impact the drinking water Multi-use park, boat ramp. (unincorp) supply.

Stonnwater Outfalls Higher Stonnwater run-off may contain contaminants from residential (homesitesand roads), Multi-use park, boatramp. commercial/industria!, and agricultural use areas.

Parks Moderate Over-application or improper handling of pesticides/fertilizers may impact drinking Multi-use park, boat ramp. water. Excessive irrigation may cause transportof contaminants through runoff. Heavy use along edge of waterbody may contribute to erosion, causing turbidity.

46 Other Culvert Clackamas Water Ave. Clackamas Field- Within Lower The impacts of this potential contaminant Storage County storage Co Observation sensitive area. source will be addressed during the facility (unincorp) enhanced inventory.

53 Transportation - Clackamas River through DWPA Clackamas Field- Within Higher Vehicle use increases the risk forleaks or Freeways/State Drive Co Observation sensitive area. spills of fuel & other haz.materials. Road Highways/Other (unincorp) building, maintenance & use can increase Heavy Use Roads erosion/slope failure causing turbidity. Over- application or improper handling of pesticides/fertilizers may impact water.

69 Homesteads - residential area Brunner Rd. Clackamas Field- Within Lower If not properly sited. designed, installed, and Rural - Septic Co Observation sensitive area. maintained, septic systems can impact Rural residential. Systems(< 1/acre) (unincorp) drinking water. Use of drain cleaners and dumping household hazardous wastes can result in groundwater contamination.

Note: Sites and areas ldentJfled Jn this Table are only potential sources of contamination to the drinking water. Environmental contamination ls not likely to occur when contaminants are used and managed property.

(1) Where multiple potentJal contaminant sources exist at a site, the highest level ofrisk Is used.

This Inventorywas completed by tho public water system's staffand volunteers In accordance with Oregon Source Water Asses

1/812003 Page 3 of4 TABLE3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANTSOURCES

PWS# 4100580 NorthClackamas Co. Wtr Com. (fo rmer Oak Lodge WO)

Reference Potential Proximity to Relative No. Contaminant Approximate Method for Sensitive Risk Level Source Type Name Location City Listing Areas (1) Potential Impacts Comments

71 Crops - !rrigated crops Brunner Rd. Clackamas Field- Within Higher Over-application or improper handling of (inc. orchards. Co Observation sensitive area. pesticides/fertilizers may impact drinking Greenhouses and nursery. vineyards, nurseries, (unincorp) water. Excessive irrigation may transport greenhouses) contaminants or sediments to groundwater/surface water through runoff. Drip.irrigated crops are considered to be a low risk.

72 Housing - High residential area Brunner Rd. Clackamas Field- Within Moderate Improper use, storage, and disposal of Density(> 1 Co Observation sensitive area. household chemicals may impact the drinking Rural residential. House/0.5 acres) (unincorp) water supply. Stormwater run-offor infiltration may carry contaminants to drinking water supply.

Note: Sites and areas Identified !n this Table are only potential sources of contamination to the drinking water. Environmental contamination !s not likely to occurwhen contaminants are used and managed property.

(1) Where m.lltlple potentlal contaminant sources exist at a site, the highest level of risk ls used.

Thls lnvontorywas completed by the public water system's staff and volunteers In accordanco with Oregon Source Water Asses

11812003 Page4 of4 TABLE 3. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 41 00187 CLACKAMAS RIVER WATER - CLACKAMAS

Potential contaminant source numbers 47 through 1127 were identified upstream of the Clackamas River Water intake by the public water system's staff and volunteers. Due to the volume of this table, a hard copy of the detailed accounting of these potential sources is only provided in Source Water Assessment sent to Clackamas River Water. An electronic version of the table (366 pages) is provided on the attached disk under the file name "Table 3 - CRW.doc'' in Word format. The disk also includes an Excel version of the inventory results.

A summary of the OC-SFWB, NCCWC and CRW Inventory Results by Sub-Watershed is provided below.

Reference Numbers Sub-Watershed las identified in Table 3 and Table 4) OreQon City - SFWB (area between OC intake and NCCWC intake) 1-14 NCCWC (area between NCCWC intake and CRW intake) 15-46 Lower Main Stem Clackamas River 47-272 Clear Creek 273-364 Foster Creek 365-369 Rock Creek 370-412 Richardson Creek 41 3-425 Goose Creek 426-443 Deeo Creek 444-845 Eaale Creek 846-928 Unmapped points (located throughout the protection area - no field mapping was comoleted for these ootential sources) 929-1 127

TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

between Forsythe and Carver on 1 533302.4387 5025022.874 residential on septic systems Clackamas River Drive (CRD) 2 533670.3951 5025431.626 Clackamas River Drive road through DWPA 3 533053.1449 5024960.689 South Fork Water Board Intake 13074 CRD 4 533731.0741 5025939.812 boarding stable ? 14135 CRD 5 533162.8698 5024931.425 Main Stem of Clackamas River through DWPA Forsythe Rd. between S. Highland 6 533819.0181 5024847.834 Serres Nursery Rd. and Hunter Ave. 7 533306.9958 5024674.28 residential on septic systems Forsythe Rd. Forsythe Rd. between S. Highland 8 533466.4374 5024793.771 sllde area Rd. and Hunter Ave. 9 533043.837 5025265.241 residential at end of Edgewater Street 10 533190.9521 5025618.469 Southern Pacific Railroad parallel to Clackamas River 11 533294.5436 5025430.808 residential Evergreen Lane 12 533064.2877 5025663.372 Oregon Self Storage 660 SE 82nd Drive 13 533165.3655 5025737.488 Clackamas River Club 790 SE 82nd Drive 14 533188.122 5025890.601 Holly View Court 1180 SE 82nd Drive North Clackamas County Water 15 533712.5037 5026298.036 Commission 14275 Clackamas River Drive between Forsythe and Carveron 16 534246.8496 5026748.453 residential on septic systems Clackamas River Drive 17 534218.7033 5026562.253 Clackamas River Drive through DWPA 18 533609.9568 5026301.913 Main Stem of Clackamas River through DWPA 19 534126.1165 5026559.423 Clackamas River Drive through DWPA Forsythe Rd. between Brunner Rd. 20 534208.9666 5025225.251 residential on septic systems and Highland Rd. 21 534185.8852 5025292.219 Nursery 14703 Forsythe Rd. 22 533972.5475 5025729.235 residential on septic systems Highland Rd. 23 533973.4846 5026027.698 Managed Forest Lands Highland Rd. 24 533209.6398 5025944.605 Maxwell Mold and Machine Shop 960 SE 82nd Drive 25 533203.5821 5025993.193 Gladstone School Bus Station north of Wheeler Ct. 26 533197.4286 5026054.887 R & R Automotive 1250 SE 82nd Drive 27 533213.2037 50261 17.25 Classic Pool and Spa 17875 SE 82nd Drive 28 533215.308 5026188.036 Riggers 17865 SE 82nd Drive West.Coast Screen Printing and 29 533216.9071 5026285.328 various retail businesses 17855 thru 17765 SE 82nd Drive across street form West Coast 30 533279.1334 5026274.121 RV & Auto Storage Screen Printing between EdgewaterRd. and RV & 31 533277.9439 5026163.43 small crops-Irrigated Auto Storage facility 32 533476.9315 5026744.43 residential Casa Blanca Ct. 33 533474.6322 5026819.654 Clackamas Residential Park SE Dean Drive 34 533392.5819 5026900.976 residential Tiffany Ct. 35 533481.8448 5026872.916 Briar Wood Town Homes SE 82nd Drive 36 533536.847 5026958.426 Harmony Road Music 17300 SE 82nd Drive 37 533590.49 5027088.401 Village Place 9100 SE Scottstree Way 38 533743.4131 5027141.848 Safeway complex SE 82nd and Jennifer St. Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 1 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 41 00591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 41 00580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

I · __ •. <··< •• • .· . .· · � ""' : ···:·: _--·:·-::<_: :.·· ·· ···.·•· ><·•·. ····· • •· ·· ..· . ; '.>_��J� r_�' .��r·• · · � ••f'l(><.($ee. · ; ·4i: 111 y,, , . • t u o · · • •... ·· •'4f�ui x,. ••.. · M ····PQ �r r� I$ �'�"''�:a":1 s9µr�? (�·1�·11 ;-::,;:-;;__:_-- ·- . ·Q.optd· lilate . •• ->� .>>.--'-" --,-- , .<< li ti?f�ppr �\;.;'' . faJJ1 • �1• ; · ··• •c<>or�lnll!•' ·:: --- ·: >io:Y-c",.JJ�.m�> · 39 534843.4583 5027635.163 Mark's Metal Technology 10300 SE Jennifer St. 40 534885.4012 5027649.248 Clackamas Station 10315 SE Jennifer St. retail businesses and office SE 82nd Drive, between Hwy 212 41 533746.3371 5028203.064 complexes and SE 82nd Dr. 42 534157.6565 5027631.88 Street Sweeper Recycle Jennifer St. and Evelyn St. Oregon Department of Fish and 43 534021.1673 5027030.843 Wildlife regional office 17330 SE Evelyn St. 44 534072.1294 5027527. 756 P.G.E. Substation Evelyn Street 45 534551.6107 5027120.217 Riverside County Park Water Ave.

46 534361.3822 5027000.699 Clackamas County storage faclHty Water Ave.

between Forsythe Rd. and Carver 47 534636.997 5026850 resldentlal area on Clackamas River Drive (CRD) 48 536857.2541 5026708.452 residential 14760 CRD and 17610 CRD between Forsythe Rd. and Carver 49 536951.7142 5026440.646 resldenllal area on CRD River Bend Youth Center/Youlh 50 535387.1323 5026872.93 Adventure Park north side of CRD 51 535300.4918 5026894.973 Johnson Creek through DWPA 52 534717.5461 5027037.192 main stem of Clackamas River through DWPA 53 534468.1874 5026877.457 Clackamas River Drive through DWPA 54 535445.875 5026566.842 crops - Irrigated 16918 & 17539 CRD 55 537422.749 5026738.241 Brownell Holly Farm north side of CRD

56 537673.3521 5026598.058 crops - nonlrrlgated 17494 CRD, on south side of CRD. 57 539292.6921 5026389.074 Rock Garden Tavern 17930 South CRD 58 538063.3163 5026326.789 resldenllal area Forsythe & Cliff View housing on Forsythe Rd. from Bradley to 59 536087.7094 5025306.152 residential area Brunner Rd. 60 537385.5303 5025542.754 Avon Kennel Bukstrom Rd. & Forsythe Rd. 61 537494.2796 5026014.003 residential area Burkstrom Rd. 62 536876.2846 5025687 .223 residential area Victory Rd. 63 538446.1285 5026289.416 Outlook Tree Farm Forsythe Rd. 64 538235. 7668 5026319.868 boarding stable 16330 Forsythe Rd. 65 537996.3825 5026103.126 livestock 15987 Forsythe Rd. 66 537965.2418 5025905.249 crops - nonlrrigated 15833 Forsythe Rd. 67 538043.3856 5025772.291 Forsythe Rd. south of CRD 68 535260.1722 5025391.815 Oregon Dried Floral Farms Beaton Rd. 69 534357.8917 5025429.471 residentlal area Brunner Rd. 70 534537.4923 5025677.305 Carpe Diem Farm 14681 South Brunner Rd. 71 534413.734 5026006.098 crops Brunner Rd. 72 534395.849 5026351.844 residential area Brunner Rd. 73 539775.6303 5027184.53 Carver Hwy. 224 74 539566.3792 5026710.206 The Hanger Hwy. 224 75 539457.3989 5026615.423 Carver Mobile HomePark Hwy. 224

Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not avallable. page 2 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410C CLACKAMAS RIVER WATER · CLACKAMAS

Clackamas River crossing between 76 539349.0426 5026500.234 Carver Bridge Carver& CRD 77 539514.7932 5026393.428 Carver Boat Ramp Springwater Rd. north side of Hwy 224, 1/4 mile 78 539240.8923 5027036.182 Full Circle Countryside School south of R. C. Rock Products Hwy. 224, In front of Full Circle 79 539194.4802 5027228.029 Park & Ride Countryside School 80 539472.2164 5027785.532 Pacific Western Co. Saw Miii 16051 Hwy. 224 81 539138.44 5027724.721 Carver Community Well 16051 Hwy. 224 82 539336.6059 5027903.623 residential area Hwy. 224 83 538954.1567 5027769.688 Riverview Mobile Home Park 15758 SE Hwy. 224 84 538878.8469 5027899.683 R.C. Rock Products Hwy. 224 85 539055.0517 5028128.821 Enger! Ridge Hwy. 224 & Eckert Ln. 86 539152.6329 5027928.48 Orchard Lake & Halladln Heights Hwy. 224 & Goose Hollow Dr. 87 538751.4245 5028078.993 Senior Care Center Hwy. 224 88 538682.7443 5028331.125 Green Acres Country Store Hwy. 224 & Hwy. 212 89 537525.1255 5028265.242 River Bend Mobile Home Park Hwy. 224 & Hwy. 212

90 537341.1531 5028290.1 Shadow Brook Mobile Home Park 13640 Hwy. 224 & Hwy. 212 Clackamas River Village Mobil 91 537273.823 · 5027830.18 Home Park 16312 SE 135th 92 536855.4204 5027207.107 Sha-Hah-Lee Golf Course Capps Rd. & SE 1301h 93 536684.2797 5027151.272 Warn Industries 12900 Capps Rd.

94 536790.774 5027327.369 Enway Northwood Food Products 16940 1301h 95 536689.0477 5027334.319 Northwest Thermal Systems 12921 SE Capps Rd. 96 536509.1163 5027227.003 POFCO 13805 SE Capps Rd. 97 536278.6302 5027108.082 rural residential 12727 SE Capps Rd 98 536365.9455 5027253.414 Wymore Transfer 12651 SE Capps Rd 99 536243.509 5027259.73 A & B Refleclorizlng 12250 SE Capps Rd. 100 536162.4984 5027247.194 Jim Smilh Excavating Wilde Rd. 101 536107.4352 5027253.436 Clackamas Sand & Gravel Wilde Rd. 102 536091.9631 5027370.63 nursery 17581 SE Wiide Rd. 103 536197.5874 5027385.747 Wrights Cuslorn Products 17150 Wilde Rd. 104 536101.6808 5027441.648 Delta Steel Supply 17140 Wiide Rd. 105 536025.2622 5027239.036 Monocrest 11711 SE Capps Rd. 106 535981.9631 5027119.741 Clackamas Compost Products 11620 SE Capps Rd. 107 535828. 7686 5027115.057 Ken Hood Recycling 11681 SE Capp Rd. adjacent to Clackamas Compost 108 536061.2846 5027167.586 salvage yard Products 109 536032.983 5027425.221 Adel Medical Ltd. SE 1201h 110 535969.8685 5027375.737 John P. Lehi Company SE 1201h McCafferly-Whillle Construction 111 535936.77 44 5027231.758 Company 5570850 1201h

112 535956.3178 5027589.622 P.P.G. Finishes Distribution Center 11900 Jennifer SI. 113 535762.9335 5027573.345 Precision Roof Trusses Inc. Jennifer SI. & 115 Ave. Notes: (1)Unlversal Transverse Mercator {UTM) Zone 10, NA027, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not avallable. page 3 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

,_ - · -:,-.> _ __ _ -, - Re_t�rence ... __ ---- tl!!:(see .· UTMl'> x-< · 'f�l>le;3) ·• i coordinate · 114 535587.6381 5027523.785 Gary's Mustangs SE 115th 115 535594.5171 5027408.463 Surglchrome SE 115th private residence I special asphalt 116 535634.2948 5027443.516 products 16590 & 16569 SE 115th

117 535584.4166 5027629.159 Tri Fab Manufacturing Warehouse SE 115th & Jennifer St. 118 535310.341 5027579.933 Concrete Services 11340 Jennifer St. 119 535721.3438 5027378.199 private residence approximately SE 113th behind Concrete Services batching 120 535304.1385 5027443. 787 Carley Creek plant 121 535136.72 93 5027584.99 Portland Road & Driveway 10960 SE Jennifer St. 122 534932.5182 5027364.449 Portland Road & Driveway 10500 SE Jennifer St.

123 534714.1919 5027156.889 SE Robert Avenue east of Safeway Rd. off Jennifer St. Clackamas River Water Drinking 124 534511.3567 5027001.015 Water Treatment Plant 9100 Mangan Lane 125 534911.8582 5027591.529 Security Chain Company 106th & Jennifer St. 126 534769.0191 5027587.162 Blount Industries 10955 SE Jennifer St. 127 534704.2381 5027592.193 Holman Distribution Company 11401 SE Jennifer St. C.B. Equipment Company Holman 128 534588.7071 5027592.015 Trucking 12001 SE Jennifer St. 122nd & Jennifer SI., 12250 Ford 129 536188.729 5027755.241 USF Reddaway SI. 130 536147.9179 5027753.993 Fred Meyer Bakery 16274 122nd 131 536719.0965 5027747.374 Cornell Pump Company 130th & Jennifer SI. 132 536778.2542 5027617.19 Mutual Materials Company 16800 SE 130th 133 536725.4161 5027620.451 A & B Reflectorizing 16795 SE 130th 134 536732.5555 5027227.433 ANI 16815 SE 130th 135 536782.9125 5027694.15 Safety Kleen 16540 SE 1301h 136 536779.014 5027741.89 ProLogis 130th & Jennifer St. SE Jennifer St.; across street from 137 537098.3772 5027655.937 P.G.E. 13011 Jennifer St. 138 536780.804 7 5027842.845 P & A Metal Fab Inc. 13009 Jennifer St. 139 536712.3239 5027809.353 Central Garden & Pet Supply 13011-205 Jennifer St. SE 140 536937 .57 42 5027969.877 FLOREXPO, LLC 13011-206 Jennifer St. SE

141 536438.3722 5027746.107 warehouse & distribution 13009-104 Jennifer St. (north side) 142 536780.3171 5027938.548 Clackamas Fire District No. 1 16100 130th 143 536736.995 5027939.662 Rolling Truck Rental & Leasing 15975 SE 130th 144 536782. 7098 5028099.574 Ruan Mega Fleet 15800 SE 130th 145 536778.0756 5028171.373 Walco International Inc. 15760 SE 130th 146 536732.009 5027404.83 Kiwanda Machine Works Inc. 15756 SE 130th 147 536777.6533 5028264.944 MST Corp. 15740 SE 13oth 148 536774.1026 5028221.549 Clackamas Feed & Pet Supply 15734 SE 130th 149 552329.1551 5014325.872 USFS Work Center River Lake Rd. 150 551788.7479 5014591.015 River Lake Road Estacada area

Notes: {1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 4 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 41 OC CLACKAMAS RIVER WATER · CLACKAMAS

- _ ··.· ;:_,'-" '.---,_ - __ ,' , -:- ;\-'_,_ .Reference ·• . .•. N UTMt.•>x;c ,· ••••.•... ··urt.11ii.)-E ·· ' i{P�t•.ntlal� �anlsource 1i�c.L• • c�otdlnate Y• j � ·· ··• Ta�le 3) ··. . j i � · Coordinate;; River Lake Rd., Endive Rd., Dandelion Rd., Fuchla Rd., Poplar 151 551865.7683 5014504.966 residential areas Rd. At the end of Klllowatt Ln. off River 152 550948.4672 5016177.352 River Mill Dam Mill Rd. 153 551124.7983 5015266.976 rural residential South Serna Rd. 154 551210.6068 5014654.717 rural residential South Salling Rd. south side of Estacada Rd. off 155 550932.7579 5014031.023 South Estacada Road Hayden Rd. 156 551978.0531 5014183.125 Hwy. 211 From Hwy. 224 to S. Day Hill Rd.

157 552005.5191 5013883.381 South Day Hill Road located on south side of Hwy. 211 158 551987.1955 5013555.713 rural residence 22988 S. Day Hill Rd. 159 552278.2412 5012901.564 Cascade Utilities S. Day Hill Rd. 160 552335.5694 5012741.746 rural residence 23250 S. Day Hill Rd. on west side of Hwy. 211, south of 161 551037.0585 5012904.126 Dubois Creek Lane Hayden Rd.

162 550866.0635 5010771.013 Christmas tree farms / AM Nursery 25970 & 25951 S. Wallens Rd. off Springwater Rd., east of Wallens 163 553312.2033 5010814.468 S. Klnzy Road Rd. 164 551779.3333 5012846.665 Perry Farms 23397 S. Reid Rd. 165 551215.1609 5014027.776 S. Reid Road SW of Poplar Rd. 166 551242.4913 5013931.669 Laura Lane on east side of Reid Rd.

Springwater Rd., north and west of 167 550006.6292 5013501.506 Springwater Road Wallen Rd. to Hayden Rd. 168 549340.2423 5014536.207 Springwater Grocery 25401 Springwater Rd. 169 549297.5684 5014615.687 Santa Gertrudis Flying K Ranch Hayden Rd. & Springwater Rd. 170 549162.1277 5014817.622 Gerber Farm Supply 21879 Springwater Rd. Springwater Rd. north and west of 171 548977.2092 5015042.431 Springwater Road Hayden Rd. to Mciver Park opposite of Park View ln., west of 172 549316.879 5015170.191 Woodland Way Mciver State Park opposite of Woodland Way, west of 173 549325.1104 5015299.7 S. Park View Lane Mciver State Park

located off Springwater Rd., 174 550353.1701 5016184.131 Milo Mciver State Park between Redland Rd. & Hayden Rd. 175 539505.2995 5026414.781 Carver Park & Boat Launch Carver NE side of Springwater Rd .. 176 539701.0785 5026123.552 Emmerts Clackamas River Estates between Hattan Rd. & Kanne Ln. William's Oregon City Compression 15124 S. Springwater Rd., near 177 539813.3416 5026031.266 Station Kanne Ln. S. Willsada Park Way, located on 178 539702.3688 5025931.849 Willsada Park Clear Creek 179 540578.683 5025497.43 rural residence 15253 S. Springwater Rd.

180 539862.0999 5025932.161 S. Springwater Road from Hattan Rd. to Bakers Ferry Rd. Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X· and Y- coordinates are provided and correlate to Figure 4. X- and Y-cocrdinates for Ref. No.'s 929-1 127 are not available. page 5 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

181 541225.0601 5025813.198 Residential Housing High Density Coqulna Ave. & S. Springwater Rd. 182 541 135.3026 5024910.569 rural residence 15430 S. Springwater Rd. from Bakers Ferry Rd. to Gerber 183 541485.7542 5023688.822 Springwater Road Rd. off Springwater Rd., between 184 542692.4304 5023686.407 Babier Road Mccubbin Rd. & Gerber Rd. off Springwater Rd., between Babier 185 543608.0731 5023381.836 Gerber Road Rd. & Harding Rd. from Gerber Rd. to Harding Rd., just 186 544153.7267 5021748.724 Springwater Road west of Gerber Rd. 187 545629.8243 5020822.346 Indian Springs Trout Farm 17951 Springwater Rd. NW of Eaden Rd., off Springwater 188 545231.2635 5021912.162 Harding Road Rd. 1624 7 Harding Rd., south of Bakers Ferry Rd. on the west side of 189 545196.8064 5024532. 74 7 day care Harding Rd. 16380 Harding Rd., south of Bakers Ferry Rd. on the east side of 545307.473 5024542.535 High Pass Farm Harding Rd. SE of Harding Rd., off Springwater 545824.1042 5021297.75 Eaden Road Rd. 547729.5181 5022112.372 Palmer Road off Eaden Rd. 546274.7707 5020418.04 Springwater Road from Harding Rd. to Mciver Park 546111.4312 5023843.138 Brlstlln Road off Eaden Rd. 546198.4559 5024615.525 S. Claus Court olf Eaden Rd. 546120.1069 5024834.746 Metro Green Spaces off Eaden Rd. 546016.9539 5025007. 788 The Cedars retreat center off Eaden Rd. 547035.1657 5022208.488 S. Rory Court off Eaden Rd. off Springwater Rd., SE of Spring 547537.6822 5018578.527 Feldhelmer Road Creek Rd.

542714.5544 5025095.749 s. Bakers Ferry Road from Springwater Rd. to Gerber Rd. 542773.491 5024654.01 Priscl11a Lane off Bakers Ferry Rd. 543397.8072 5025142.867 S. Foster Lane north side of Bakers Ferry Rd. SE of Foster Creek Ln., off Bakers 543498.5862 5025256.606 Tranquility Lane Ferry Rd. 543361 .3136 5025050.298 Foster Creek Lane south side of Bakers Ferry Rd. 545028.8991 5024899.21 S. Bakers Ferry Road from Gerber Rd. to Barton 544394.3336 5024964.54 S. Rosf;lmary Court off Bakers Ferry Rd. 544754.0007 5024936.525 Timber Creek Lane off Bakers Ferry Rd. NE of Chenowith Rd., off Bakers 545520.5359 5025031.617 Latourette Road Ferry Rd. 546347.0337 5025468.443 Barton Park off Bakers Ferry Rd. located on the northwest side of 547852.8561 5025393.506 Stoneybrook Stables Hwy. 224, near Moore Ln. 25027 SE Hwy. 224, located on 546433.9497 5026164.613 Haynes Wrecking Co. north side of Hwy. 224 in Barton 552408.3589 5012056.833 S. Bard Road off Day Hill Rd.

(1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordlnates for Ref. No.'s 929-1 127 are not avallable. page 6 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 -OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

213 552772.9024 5012228.648 rural residential SE Day Lane Rd., north of Bard Rd. 214 554653.1041 5009397.072 rural residential Klnzy Faire Ln. 215 555732.4758 5008795.09 salvage yard 27247 S. Klnzy Rd. 216 555169.5246 5008491.597 S. Skinner Road south of Klnzy Rd. 217 555456.5446 5008228.143 S. Habel! Road south of Skinner Rd.

218 553885.2729 5009631.786 Tucker Road SW of Branch Tucker D.L.C. Airport 219 552994.0578 5010023.08 S. Century Road east of Estacada Hwy. 161 220 552339.0796 5016073.281 City of Estacada east of Hwy. 224 221 552169.8918 5015644.664 Grace House 380 NW 6th Ave.

east of Hwy. 224, northwest corner 222 551650.0015 5015857.085 Estacada Lumber of the outskirts of Estacaca west of Eagle Creek Rd., at the 223 551874.5875 5016069.428 Ericksen Self Storage & U-Haul west end of 10th Street 224 551862.0334 5016559.244 S. Eagle Creek Road east of Hwy. 211 N.W. Industrial Way & Evergreen 225 551569.3195 5015813.766 Industrial area of Estacada Road 226 551376.6676 5016819.058 rural residential SE Rivermlll Rd. 227 550779.7997 5016528.559 Estacada Rock Products SE Rlvermlll Rd. 228 551049.2727 5016698.682 Estacada Pre Mix River Mill Dam Rd. 229 550503.7 958 5017079.816 rural residential Farmstead Rd. 230 551233.9135 5017210.079 Estacada Mini Storage near River Miii Dam Rd. 231 550779.6381 5018884.427 rural residential SE Heiple Rd. Eagle Creek Sky Diving, Beaver 232 550048.8995 5018226.758 Oaks Airport SE Heiple Rd. 233 548423.0127 5018199.256 Paradise Community Club at end of Heiple Rd. 234 548436.3105 501 8392.326 residential SE Starr Rd. 235 548631.4906 5017951.697 Twin Island Community SE Woods Rd. & SE Island Rd. 236 549178.1407 5019245.431 rural residential SE Samuels Rd. 237 548974.8844 5019929.993 rural residential SE Dowty Rd. 238 549039.039 5020602.923 Eagle Creek Golf Course 25805 SE Dowty Rd. 239 550755.077 5020095.138 rural residential SE Talons Rd. 240 549594.5446 5019694.716 rural residential SE Folsom Rd. 241 550179.5452 5019745.239 Old Farm House Nursery Hereford Rd. 242 550038.5896 5022647.017 rural residential Burnett Rd. 243 550100.6565 5022531.552 Barlow Trail Dairy SE TlrnrnLane 244 551090.8666 5019134.478 Hwy. 224 from Hwy. 211 to Barton 245 549382.9986 5023408.874 rural residential Glover Rd. SE 246 549197.6199 5023937.589 Rainbow Greenhouse 28437 Hwy. 224 SE Dale Lane, northeast of Hwy. 247 549245.3384 5024290.838 rural residential 224 248 549548.0452 5024410.762 Kingdom Farm Saddle Breeds 28544 SE Dale Lane 249 548773.2045 5024178.532 rural residential SE Shuttle Rd. 250 548637 .5891 5024565.494 Douglas Ridge Gun Club Hwy. 224 251 548469.6672 5024723.139 Don Slckmann Metal Fab Inc.

(1 )Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 7 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 41 00591 -OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410C CLACKAMAS RIVER WATER - CLACKAMAS

Re.�e�en:ce < .· ·.·• '.:No. ("'ee v1:r.1111x, ·; Table3). ·. ·. · Coo!�lnate 252 548089.9122 5024789.86 rural residential SE Odell Rd. 253 548521.2989 5025167.654 rural residential Bartlemay Rd. SE 254 5481 18.5399 5025129.415 R.A. Shopper! Logging Hwy. 224

26595 S!oneybrook Lane,4/10 of a 255 548024.687 5025217.69 small sub-division mile northwest of Bartlemay Rd. 256 547858.4391 5025699.127 rural residential S. Moore Lane 257 547408.4978 5025608.841 Barton Feed 25621 Hwy. 224 25701 Hwy. 224, just southeast of 258 547307.128 5025803.275 ELTE Equipment Sales Amlslgger Rd.

259 547212.6595 5025762.279 Barton Community Baptist Church off Hwy. 224 260 546377. 0987 5026189.394 Barton Store & Shell Gas Station 24831 Hwy. 224 SE 261 545871.4215 5026256.835 salvage yard 25040 Hwy. 224 SE 262 545656.0924 5026409.677 machine shop 24424 Hwy. 224 SE 263 545833.2068 5026459.603 rural residential Barton to Carver

264 543162.1106 5025612.729 Deep Creek Sand & Gravel unknown street east of Deep Creek 265 543019.2806 5025697.677 rural residence 22015 S Hwy. 224 266 542859.4062 5025711.991 Gear Heads Auto Repair 21730 S Hwy. 224 267 542310.4831 5025937.546 rural residential SE 197!h Ave. 268 541935.0744 5025702.921 rural residential Semple Rd. SE 269 542157.396 5025939.264 county property west of 197!h, on Hwy. 224 SE 270 542275.85 5026242.544 River Rock Nursery 19350 SE Hwy. 224

18600 SE Hwy. 224, located 4/10 of 271 541559.8205 5026928.168 rural residence a mile southeast of Tong Rd. 272 540216.5658 5026861.476 rural residential Ellers Circle SE 273 551677.6997 5009702.331 truck shop south of Holman Rd. 274 551673.4405 5009841.52 woodsy pasture with pond south of Holman Rd. 275 551241.8478 5009828.314 partial harvest In process south of Holman Rd. 276 550937 .5858 5009798.579 harvest area south of Holman Rd. 277 551481.5858 5009446.043 Christmas trees, young Metzler Rd., south of Holman Rd. 278 551648.3301 5009297.193 oats, cover crop Metzler Rd., south of Holman Rd. 279 550920.4983 5009400.524 cemetery Metzler Rd., south of Holman Rd. 280 550307.482 5008949.788 pasture Metzler Rd. 281 550536.4732 5009207.69 unmanaged Christmas trees Metzler Rd. 282 549943.9331 5008994.454 truck shop Metzler Rd. 283 549966.0414 5008730.211 Managed Forest Lands Metzler Rd. 284 549351.0043 5008335.508 Metzler Park Metzler Rd. 285 551501.1328 5008637.857 Former Christmas Tree Farm Warnock Rd. 286 551249.9082 5008658.218 nursery Warnock Rd. 287 552189.7752 5009815.249 abandoned Chrislmas trees Springwater Rd. 288 552936.8414 5009531.73 abandoned Christmas trees Springwater Rd. 289 552566.094 5009353.323 blueberries Springwater Rd. 290 552642.781 5009118.796 Christmas trees Springwater Rd. Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 8 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

- _ - -, _ --_ .-_ !.-_ .;· - --- . . . _ - - - ·. · . 1. Reference · ' Jf o. (see l!Jr.it'J){; urr,',f11 y. •. Potential contalllln�n!�o1Jrce,. Jaljl��} . co.ordinate •.cooldlnate; 1· .·· :·t:1aliie' 291 552726.5859 5008661.636 recenl clear-cul Hwy. 211 292 552490.826 5008166.65 unmanaged forest lands Hwy. 211 293 551014.9948 5008135.517 new highway cul Hwy. 211 294 549532.8211 5007444.792 recent clearcut area Highland Rd. 295 548985.0896 5008357.849 new Christmas trees - sleep Highland Rd. 296 550362.4907 5007141.841 old clearcut area Shibley Rd. 297 550328.3878 5007359.685 pasture area Shibley Rd. localed on Elwood Rd., between 298 552022.4 728 5004731.498 auto/farm shop Shibley Rd. & Bittner Mill Rd. large horse barn & Christmas trees 299 551059.7173 5005358.408 farm Elwood Rd. 300 550379.3744 5005693.062 forest and rural residential area upper Elwood Rd. 301 551926.4248 5007422.294 confined pasture Morgan Rd. 302 553160.7511 5007295. 744 overgrazed pasture Morgan Rd. 303 553052.0321 5007730.194 overgrazed pasture Morgan Rd. 304 553627 .2424 5007692.921 overgrazed pasture Hiiiockburn Rd. small scale meat processing 305 553716.2781 5007463.343 business Hlllockburn Rd. 306 553889.5604 5007618.941 truck repair shop Hlllockburn Rd. 307 553680.2444 5006409.257 clearcul area - < 10 yrs Hillockburn Rd.

localed on the west side of Habeil 308 555454.8464 5007 407 .105 pasture Rd., just norlh of Hlllockburn Rd. localed on the west side of Habeil 309 555359.1159 5007855.367 small sawmill Rd., soulh of Skinner Rd.

310 555773.3791 5007717.751 fill localed on east side of Habeil Rd. located on the east side of Klnzy 311 555635.9265 5009080.835 clearcut area - < 10 yrs old Rd., north of Skinner Rd. localed on the west side of Klnzy 312 553872.2558 5009519.201 auto junk yard - old Rd., south of Tucker Rd. located on the west side of Kfnzy 313 553393.2308 5009531.673 land clearing Rd., south of Tucker Rd. unknown operations - Industrial/agricultural processing - 314 554748.5741 5008588. 767 small scale Skinner Rd. 315 554153.2471 5009193.677 Christmas trees Skinner Rd. 316 552809.1177 5010397.881 logging equipment homebase Century Rd. 317 552835.9066 5010538.63 nursery Century Rd. 318 551506.7117 5011245.155 logglng equipment homebase Windy Hiii Rd.

319 549201.2751 5014365.201 feed store, equipment and fertilizer Springwater Rd. 320 547211.6286 5016312.066 cemetery Jubb Rd. 321 547618.1966 5014721.608 nursery Clear Creek Rd. 322 545774.6885 5016984.196 transmission line easement Stormer Rd. 323 546830.1002 5017592.341 container nursery with pond Stormer Rd. 324 546222.249 5019145.533 nursery Spring Creek Rd. i..-�-'--��325 '--��-544856.643'--'-L �-'-'50205 --'- '35.611'---' -. 1 -��channeled ditch - new '-pond��- L;;,:c_"-"-"Mattoon Rd.-'-'-'-- ��__ J Norn - - (1)Universal Transverse Mercator (UTM) Zone 10, NA027, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordlnates for Ref. No.'s 929-1127 are not available. page 9 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

_ - _ · - _- _ - - _ ; . "'- -., -' - _ -- - _____ -- _--__.. ___- ',"_:< :> ' ___ :::.'_ -- ·_.. _ !.-· ·' --· -:-· - :·; ::.: : R8ferent:e - _:: :::: . - " : _ _ _ -_ :.;-·>:-' : · • · • + • · · .• .• •.• . • ..•··•· ··. · . •• •• No. (see 0TM1.'l;x- > UJM1'ly · •. Potential Ci:> t�(lll ant our e ! · · °' s c . ! Table �) • • . < • �• · .··. · · · · C!iordinate Coordlna.te Name i �ppro;lfllat�'�O:c�tll))l ; ( ; 326 545156.2126 5019393.073 rural resldenllal Mattoon Rd. 327 545469.2482 5018826.796 new pond Mattoon Rd. 328 545536.133 5018673.371 confined livestock Mattoon Rd. 329 545503.808 5018205.357 abandoned Christmas trees Mattoon Rd. 330 545772.3264 5015536.705 Unmanaged Forest Fellows Rd. 331 546310.9187 5014712.71 Christmas Trees Fellows Rd.

332 546049.3925 5014113.302 clearcut area • < 10 yrs Fellows Rd. 333 547790.6547 5013668.442 clearcut area - < 5 yrs FellOl"(S Rd. 334 547233.4114 5012032.633 confined animals Fellows Rd. 335 546866.9641 501 1803.454 culvert Forest Park Rd.

336 547082.8551 5008821.882 poultry barns • large Schockley Rd. 337 546063.2273 5009584.538 Christmas trees Lewellen Rd.

338 545985.2431 5010609.205 partial cut area • < 5 yrs Upper Highland Rd. 339 543134.3378 5013703.75 recent clearcut area Ridge Rd. 340 . 543931 .3964 5015303.585 paper mill sludge storage site Ridge Rd. 341 544764.3767 5016805.135 new clearcut area Redland Rd. 342 541766.0018 5019400.035 logging/truck maintenance shop Redland Rd. 343 541028.2778 5020206.649 transmission line easement Redlarid Rd. 344 540851.1711 5021113.322 horse barn Fischer's Mill Rd.

345 541172.4076 5021454.814 resldenllal area off Fischer's Miii Rd., on north side 346 543716.0015 5020172.707 recent clearcut Fischer's Mill Rd. 347 543894.377 5020311.075 Feedlot Fischer's Mill Rd. 348 544730.6986 5019540.404 private fish hatchery Sherwood Ave. 349 544570.306 501 9900.397 clearcut area Sherwood Ave. 350 543977.7047 5019749.662 stables Ridge Rd.

351 544088.193 5020482.839 tractor repair and fertilizer storage Fischer's Mill Rd. 352 544233.0749 5020619.878 muddy animal yard with pond Fischer's Mill Rd. 353 543674.7166 5020984.157 municipal sludge application off Strow Bridge - west

354 539558.1378 5025982.918 recent clearcut and resldenllal area Hattan Rd. 355 539462.3665 5025316.663 pipeline easement Edgewood St. 356 539773.4516 5023816.92 raw land channel modlficallon Hattan Rd. 357 539935.604 5022312.616 horse boarding and pasture land Hattan Rd. 358 544858.594 5021318.815 Indian Springs Trout Farm Hattan Rd. 359 543777.0363 5023060.52 seasonal operallon Gerber Rd. 360 544107.3996 5023103.549 commercial nursery Harris Rd. 361 544280.1694 5025049.145 auto junk Baker's Ferry Rd. 362 540925.1556 5024664.844 cemetery Springwater Rd. auto/truck junk, building demolition 363 541225.3559 5024607.57 junk Springwater Rd. 364 537846.5771 5025548.925 recent clearcut area Bradley Rd. 365 545995.0699 50221 16.608 recent clearcut area - small Eaden Rd. ditched pasture area with little 366 546574.9699 5022134.352 shade Eaden Rd. Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 10 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

< R.'9t0i&rice (�ee > No; .· , Tabfe a) 367 546677.0369 5023132.483 Earl D. Ostrander Substation 16885 Eaden Rd. channel modification, no cover, 368 545371.7983 5024054.319 agricultural Harding Rd. 369 545347.2794 5022693.67 powerllne row divide Harding Rd. Morning Way Sunrise Village Mobile 370 538354.1192 5028500.622 Home Park 152nd Ave. & Morning Way

371 538309.1196 5028427.001 M. Snyder's Landscape - Contractor 14763 Morning Way 372 538228.1949 5028471.47 office space Morning Way

located on the east side of 152nd 373 538540.9427 5028412.447 farm - grazing animals Ave., just north of Hwy. 212 374 538417.9082 5028777.229 Ridgewood Mobile Home Park 152nd Ave. & Louise Lane 13895 at 152nd Ave. & Oregon Trail 375 538462.5845 5029678. 769 Oregon Trail Elementary School Dr. between 142nd Dr. & 152nd Dr. to 376 538651.1072 5030013.45 residential area - high density Sunnyside Rd. 147th Ave. & Sunnyside Rd. - south 377 538052.0602 5029984.461 Sunnyside Village Mall side north of Sunnyside Rd. al 1471h 378 538189.8155 5030444.094 pump station Ave. north of Sunnyside Rd. - grassy bulte facing south, east of 162nd 379 538674.5329 5030433.616 grasslands Ave. Airport Rd. off Vradenburg & 162nd 380 539180.5038 5032090.307 Trohs Memorial Airport Ave. 381 539088.5013 5030254.537 Sunnyside Veterinary Clinic 1591h Ave. & Sunnyside Rd. G.T.E. Service & Maintenance 382 539601.044 5030281 .188 Shop Sunnyside Rd. & Rock Creek 383 539529.0765 5031218.785 Pleasant Valley Golf course 162nd Ave. & Manner Rd. 384 539308.5792 5031331.535 rural resldentlal - mixed 162nd Ave. & Manner Rd. 162nd Ave. - east side - just north of 385 539470.6055 5028755.163 agricultural - pepper crop Hwy. 224 located on the west side of 162nd 386 539305.5262 5028710.485 dairy farm Ave., north of Hwy. 212 387 539524.5568 5029353.373 rural res!dential 162nd Ave. 388 539748.8363 5030293.024 George's Garden - Nursery 1651h Ave. & Sunnyside Rd. east of 172nd Ave., at Armstrong 389 540309.5522 5028744.852 agricultural - squash field Rd. west of 172nd Ave., at Armstrong 390 540219.8493 5028727.476 Fisher Excavating Rd. 14292 172nd Ave. - east of 172nd 391 540333.134 5029389.079 agricultural - farm and pepper crop Ave., at top of hill

392 539834.4967 5029854.55 Rock Creek Green west of 172nd Ave., at boltom of hill 393 540200.4953 5030187 .344 church 172nd Ave. & Sunnyside Rd.

12525 172nd Ave. - east of 172nd 394 540297.018 5030689.309 nursery - small, unnamed Ave., north of Sunnyside Rd.

Notes: (1)Universal Transverse Mercator {UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not avallable. page 11 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

Refe-r8f1'c0 ·.··.··N'<>; (��ei Jabt� 3> 395 540270.6033 5031433.207 Pleasant Valley Nursery Troge Rd. at 172nd Ave. 396 540178.8939 5032428.116 llama farm 172nd Ave. & Hemrick Rd.

397 540255. 7281 5032517.343 future church site 172nd Ave. & Hemrick Rd. - north east of 172nd Ave., before Wooded 398 540253.5794 5033055.914 car repair business Heights Dr. rural res!dentlal - mixed rural and 399 540800.3588 5029721.313 medium density housing Sunnyside Rd., east of 172nd Ave. located on the south side of 400 541909.7996 5029498.581 Damascas Veterinary Cllnlc Sunnyside Rd., near Hwy. 212

located on the south side of 401 542115.5595 5029389.344 U-Pull-Jt Car Lot Sunnyside Rd., north of Hwy. 212 located on the north side of Sunnyside Rd. at Hwy. 212 402 542381.965 5029310.616 Army Surplus intersection

located on the west side of Foster 403 542479.7507 5029302.939 Brundidge Construction Parking Lot Rd., just north of Hwy. 212 located off the west side of Foster Rd. on Damascus Lane, north of 404 542319.5719 5029576.352 Damascus Water District Hwy. 212 east side of Foster Rd., just north of 405 542356.6437 5029899.087 rural residentlal - mixed High Ridge Ct. east of Wiese Rd., on Bohna Park 406 543063.8286 5031594.567 channelized creek Rd. located on east side of Wiese Rd., 407 543086.9435 5031078.277 clearcut area south of Bohna Park Rd. 408 539249.7179 5028412.174 transportation corridors Hwy. 212 & Hwy. 224

409 540500.4204 5030427.887 farm - heavy grazing Vogel Rd., just east of 172nd Ave. located at the end of SE Delia St., 410 542445.0739 503161 1 .909 rural residential - mixed just north of Rock Creek Tillstrom Rd. - west, south of Borges 411 542105.9184 5032534.014 Commercial Weddings & Events Rd. 2 lots Into Clackamas County, area 412 540583.9805 5033246.786 future urban area - Pleasant Valley located west of Foster Rd.

located on the west side of Wiese 413 543116.4351 5029875.389 rural residential - mixed Rd., just south of Dogwood Ln. Alder Springs Ct., located on the channelized creek with culvert in west side of Weise Rd., north of 414 542756.9524 5029578.76 residential area Hwy. 212 Damascus - Hwy. 212, east of 415 542740.0697 5029303.587 Damascus Village Foster Rd. 416 543152.1258 5028708.962 rural residential - mixed Royer Road & SE Barlow Court

rural residential area and housing located at 222nd Ave. & Regner 417 544367.0392 5028944.889 development Terr., just south of Peggy Ann Dr. 418 544927.0599 5029193.397 rural residential 232nd Ave., north to south Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 12 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

· _ . ''" _,_ ,-_ ,- .·_ , . - - · - _ - .. '._R&t e�en,Ce - 1-_::_-; -- , - __ , __ _ :- " ' ..,...... - ;: _ "-,--/- : - . NO, (S:lle > X- UTM111 · P(>fentlal- Con tamin0nHlource ·. . . UTMW i Y- • · Tabte 3l .. co.(lrdl.riate ·. • Coordinate>. · •Nan\• . I A��r�x lon�ie't.Ji:auon residential area - mixed rural and Weatherly Ln., located on the west 419 544748.8873 5027683.88 low density side of 232nd Dr. residential area - mixed rural and Royer Rd., located south of Hwy. 420 543803.8313 5027734.525 low density 212 residential area - mixed rural and 421 541254.9494 5028702.743 low density Hwy. 212 to Tong Rd. resldentlal area - mixed rural and 422 541053.6131 5027900.049 low density Tong Rd., located south of Hwy. 212 located on Richardson Creek at the end of Keller Rd. - off east side of 423 541958.926 5027842.998 Sunshine Valley Nursery Tong Rd. Richardson Creek & Hwy. 224, on south side of Hwy. between Tong 424 541326.0807 5026925.591 Calcagno Farms and Marina Rd. 425 541851.5011 5027478.176 Stillmeadow Retreat Center Marina Rd. off Hwy. 224 Van Curren Rd .. north of Wildcat 426 552451.3743 5021148.488 pasture land Mountain Dr. east side of Van Currin Rd., south of 427 552353.2888 5021335.099 Dorman Kennels Valentine Ln. both east and west sides of Van 428 552247.5986 5021461.423 pasture land Currin Rd. Goose Creek on Van Currin Rd., 429 552315.5757 5021810.115 creek crossing north of Valentine Ln. east and west side of Van Currin 430 552363.4645 5021908.827 pasture land and Christmas trees Rd., north of Goose Creek

431 551854.5858 5021463.109 pasture land Filbert Rd., west of Van Currin Rd. 23930 Filbert Rd., north of Walnut 432 551767.0601 5022061 .586 residential - travel trailer Ave. Filbert Rd., on soulh side of Goose 433 551832.0581 5022049.553 rural residential with shop Creek east and west side of Filbert Rd., 434 551885.1671 5022425.833 rural residential area north of Goose Creek 435 551551.2754 5022766.793 oak woodlands Filbert Rd., north of Suter Ave. 436 551446.4451 5022416.975 creek crossing and bridge located at the end of Suter Ave. 437 551279.5795 5022878.583 pasture land Fiibert Rd., north of Suter Ave. 438 551092.7904 5023094.792 rural residential south side of Jackknife Rd. 439 550526.253 5022869.544 gasoline station Hwy. 211 & Hwy. 224 north side of Hwy. 224, east of 440 549843.1714 5023135.188 agricultural land Amlslad Ln. northwest corner of Glover Rd. & 441 549412.4052 5023464.036 tooland die maker/metal fabricallon Hwy. 224 german shepherd kennel and located on the west side of Hwy. 442 549305.7912 5023779.943 nursery 224, south of Dale Ln. nursery on creek - disturbed riparian 443 549117.5715 5024032.994 area Hwy. 224 at Goose Creek crossing northeast corner of Hwy. 212 & 444 544315.048 5029388.663 foodcrops, berries 222nd Dr .. at Wetzels Corner south side of Hwy. 212, between 445 544635.0138 5029273.167 rural residence with shop 222nd & 232nd Dr. Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 13 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

• • · ·· • · . ·· • · .. ·. . · • . . •• ...... •·· .Retereric.e ·. ..·.• ·. • • • ··<·'.: .. · • . · . t •,N!>><�ee . . ·· • . UTMl'Jx. UTM!'!y;. Potential· co�tamln�ritSource· . · Name .. . • · ·.. . >•Jable 3) > . C.oordlnate. Coorillniite . · • .. ·· •• . / A�f>toxl�ai,[J�;uo� ·

soulh side of Hwy. 212, between 446 545215.807 5029251.312 foodcrops, berries 232nd Dr. & 248nd Ave.

south side of Hwy. 212, between 447 545603.8225 5029283.001 above ground fuel tanks - old 232nd Dr. & 242nd Ave.

south side of Hwy. 212, between 448 546137.3194 5029312.437 Saint Paul Church 242nd Ave. & Hollyvlew Ln. north side of Hwy. 212, west of 449 546292.7678 5029402.854 rural res!dentlal with shop Bartel Rd. north and south side of Hwy. 212, 450 546837 .1945 5029274.415 nursery Bartel Rd. - 2571h Ave. north side of Hwy. 212, west of 451 54691 1.3373 5029441.601 Holly View Baptist Church 257th Ave. south side of Hwy. 212 at 2571h 452 547024.4232 5029412.14 large barn/stables Ave. north side of Hwy. 212, west of 453 546994.7006 5029516.704 Green Acre Dog Kennel 257th Ave. commercial construction storage 26180 SE Hwy. 212- south side of 454 547799.4355 5029937.015 facility Hwy. northwest side of Hwy. 212, near 455 548001.3164 5030233.4 Meler Dairy Farm 272nd Dr. northeast side of Hwy. 212 & 272nd 456 548356.0808 5030494.836 Christmas trees Dr. 27600 SE Hwy. 212 on Deep Creek 457 548639.5286 5030496.807 Boring Industrial Park on south side of Hwy. Boring Rural Area - Business & Hwy. 212, from Richey Rd. to north 458 548852.9429 5031063.63 Community of 282nd Ave. localed of the north side of Hwy. 459 549137.5933 5031026.315 Boring Fire Station and Post Office 212, east of 282nd Dr. John Holmund Nursery - possible 29281 SE Hwy. 212 - north side of 460 549954.0271 5031064.422 project Hwy., north of Lani Ln. south side of Hwy. 212, between 461 549654.8209 5030929.972 junkyard Burt & Lani Ln. south side of Hwy. 212, between 462 549846.0858 5030935.829 stock nursery Burl & Lani Ln. Chambers Equipment, Sales, north side of Hwy. 212, west of Hwy. 463 551121.4079 5031060.541 Storage, Repair/ U-Pull-11 26

northeast corner of Compton Rd. & 464 551575.8151 5031074.458 foodcrops - berries & pumpkins 3121h Dr., on east side of Hwy. 26 gasoline station, restaurant, model South east corner of Comton Rd. & 465 551533.0535 5030967.674 railroad 3121h Dr. on west side of 3121h Dr., just north of Compton Rd., northeast of Hwy. 466 551420.4087 5031201.692 poultry slaughter house 26 467 551521.142 5031356.586 baseball field and parking lot SE 312th Dr., north of Hwy. 212

468 551410.9224 5031511.421 business SE 3121h Dr., south of Dolan Creek 469 551407.294 5031629.891 stable 11681 SE 3121h Dr. Note lo--�� (1 )Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and cprre!ate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 14 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

· • • . · · · : . · Y · · · �e1ere�c� •· . · · · ... · ·.· ·...... · ..· · ··. 1•• . . .;· · . . .·. UfMtily; : · ...... • ··. · N<>.(see I UTM11lX- · P len tia· IC I I anIS . o urc.e .. ' · · . > 0 0 ·· · . .. I Tllble3) Coord.lnate •' Coorcatlon · ·••·••·• · businesses - including Chester south of, and including, 11131 SE 470 551396.5358 5032190.155 Drawers Orient Dr., soulh of Joette Dr.

471 551354.02 5032294.326 rural residence with shop located on north side of Joette Rd. 472 551185.1825 5032203.191 rural residence with shop 30465 SE Joette Rd. 473 551129.2567 5032307.256 abandoned cars - pasture land 30330 SE Joette Rd. 474 550997.6863 5032303.227 green house 31050 SE Joelle Rd.

located on east side of Intersection, 475 551516.5082 5032582.8 stock nursery Haley Rd. & Orient Dr.

476 551391.1378 5032585.361 stock nursery and Christmas trees 30564 SE Haley Rd.

477 551434.9064 5032659.253 rural residence with shop and farm 30205 SE Haley Rd. rural res!denllal - old farm worker 478 550597.0655 5032673.221 housing at corner of Cindy Ln. & Haley Rd. rural resldentlal with shop - large 479 550578.9234 5032837.581 housing development 10230 Cindy Ln. south side of Haley Rd., west of 480 550600.8991 5032548.051 nursery Cindy Ln. 481 550794.7253 5032679.275 tree nursery north side of Haley Rd. 482 550199.9857 5032509.558 green house west side of McCreary Ln. 10702 McCreary Ln. - on east side 483 550317.4525 5032546.077 nursery - possible project of road 484 550836.5187 5031493.83 Highway 26 runs through protection area north side of Haley Rd., east of 485 550097 .1703 5032631.697 pasture land Berry Good Fruit Stand south side of Compton Rd., east of 486 552747.4337 5030932.317 nursery Hwy. 26 south side of Compton Rd., east of 487 552801.472 5031098.889 nursery and pasture land Hwy. 26 488 552320.2059 5031314.91 Pond 11965 SE Revenue Rd. 489 552323.6097 5031631.74 nursery and berries 12072 SE Revenue Rd. north side of Revenue Rd., south of 490 552328.8813 5032106.532 pasture land - cattle Chin St. south side of Revenue Rd., south of 491 552366.6157 5031949.477 nursery Chin St. 492 552618.5795 5031904.458 nursery 32695 SE Brooks Rd. 493 552754.6997 5031769.927 unknown business operation 22800 SE Brooks Rd. 494 553199.4735 5031889.33 automotive shop 33333 SE Brooks Rd. 495 553348.5815 5031748.795 Overton's Nursery 33426 SE Brooks Rd. 496 553865.2442 5031889.91 green houses 34020 SE Brooks Rd. 497 553961.3614 5031767.567 Commercial ornamental grasses 34045 SE Brooks Rd. 498 554185.215 5031774.424 nursery 34175 SE Brooks Rd. 499 554758.6077 5031785.285 nursery 11223 SE Brooks Rd. 352nd Ave., south of Brooks Rd., 500 554756.6535 5031640.122 foodcrops - berries north of Riggs Acres 501 554690.3657 5030569.938 Northwest Shade Trees Dunn Rd. at 352nd Ave.

Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 15 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

. .· . , . · · .· .: . '· · :Ref8tence' . '; '.:,' : · (;� < · . '•,, 1 ' No. (see UTMc'ix· UJM 'lyc Potential Con.tamlnant S· ource .: • • • • . ,. Table 3) .· 1 ·. .. ·· Coordll)a!e • • coi>rillnate . Name .·.. . 1 < �µproximate J.ocat!on.: . · · .•.•.•.•. 502 554574.9384 5031113.587 nursery 34591 SE Campion Rd. 503 554150.3516 5030981.998 nursery SE Compton Rd. west side of Orienl Rd., soulh of 504 552730.8158 5030608.985 nursery Campion Rd. east side of Orient Rd., south of 505 552805.767 5030749.677 nursery Compton Rd. 506 552832.4297 5030526.133 mobile home park 13025 SE Orient Rd. High Forest Farm and Schmidt & 507 552973.9293 5030424.993 Sons 13355 SE Orient Rd.

508 553076.8828 5030507.404 Gas Station across from 13355 SE Orient Rd. off east side of Orient Dr. on Bobby 509 553167.0905 5030786.96 rural residential Bruce Ln. 510 553217.8156 5030643.716 Living World Fellowship south of 13047 Bobby Bruce Ln. located on the southeast side of Orient Dr., across from Bobby Bruce 511 553155.0223 5030325.066 nursery Ln. 512 553789.6953 5029619.295 private ra11road 340th Ct., north of Kelso Rd. 513 553684.777 5029392.024 large storage buildlng 33930 SE Kelso Rd. northeast corner of Kelso Rd. at 514 553365.3116 5029481.007 small dump trucking operation Hwy. 26 southeast corner of Kelso Rd. & 515 553467.5229 5029378.663 Geren's Feed & Farm Supply Hwy. 26 516 553095.4672 50294 72.7 42 Gulde Dogs for the Blind Kelso Rd., west of Hwy. 26 517 552799.848 5029002.161 nursery/golf course west side of 329th Ave. 15909 SE 329th Ave. - 3291h Ave. 518 552960.949 5028908.022 Camelot Farms south of Kelso Rd. east and west side of 322nd Ave., 519 552361.7825 5029529.529 nursery north of Kelso Rd. 520 552276.9335 5030139.96 Reynolds Excavating located at the end of 322nd Ave. 322nd Ave., south of Kelso Rd. on 521 552352.8808 5029173.204 agricultural area/nurseries east and west side of street

522 552221.8158 5029142.669 abandoned cars across from 15800 SE 322nd Ave.

523 550218.8469 5029305.389 Don Schmidt Nursery Kelso Rd., east of Tickle Creek Rd. south side of Kelso Rd., from 524 548860.9999 5029297.043 Leipolds Berries Amslgger Rd. to 287th Ave. Mt.View Golf Course - possible north side of Kelso Rd., west of 525 548328.604 5029669.717 partnering Richey Rd.

south side of Kelso Rd., west of 526 547776.4381 5029184.584 Greenleaf Golf Course Amsigger and east of 262nd Ave. 527 551393.4327 5029275.512 stable - possible project 312th Ave., south of Kelso Rd.

528 551385.9792 5029090.856 nursery east and west side of 312th Ave.

529 551529.7896 5029352.239 kennel 14605 SE 312th Ave. at Kelso Rd. Kelso Rd., west of 312th Ave., on 530 550943.5037 5029334.285 lslle Nursery south side of street Note (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 16 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 -OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

. . • . .. . ·. . ·.··· .· . · · ·.· . ·. . ·R�_t e·re n:ce · I• . . ·.· . ' < ·· . · . ·. . . . UTM11rx; .; •• I •·· No>(see ._ ':, url\lt•iy-- ·--- "", ·". - -- f>otent1a1•con.ta.011nantsource:_- · - . _ . • ·•. _ _,_ . ,,, -: _.- ame·_- _._ -:_: -�:-· < ·:: , ', :Table3) Coordinate ·ci.>i.>r _ - ' .A.PPrJ�1�at��iicatlon ; Kelso Rd., west of 312th Ave., on 531 550893.9831 5029438.243 dairy farm north side of Kelso Rd. 532 550508.9875 5029307.872 cattle/pasture land 29640 Kelso Rd., on south side northeast corner of Frank Ave. & 533 549713.8047 5029441 . 735 Blthel Farms Kelso Rd. 534 549720.3905 5029863.832 equipment repair shop 14360 SE Frank Ave. 535 549611.3748 5029979.38 dumpslte - miscellaneous 13865 SE Frank Ave. 29592 SE Church Rd., on south pond, stream crossing - possible side of Church Rd., east of Frank 536 550292.8085 5030125.534 project Ave. 537 550994.1446 5030258.885 nursery 30500 SE Church Rd. northwest corner of Church Rd. & Stockman Nursery Sales - possible 312th Ave.. on west side of 312th 538 551403.1701 5030251.597 project Ave. 312th Ave., north of Church Rd., on 539 551535.046 5030255.635 cattle - possible project east side of 3121h Ave. on west side of 3121h Ave., south of 540 551416.1424 5030694.008 farm - possible project Hwy. 26 13697 SE 3121h Ave .. south of 541 551528.1991 5030051 .184 Steven's Machine Weldlng Church Rd. south of Church Rd., across the 542 551421.8128 5030080.849 farm buildings street from 13697 SE 3121h Ave. 543 551590.7347 5029512.317 poultry or rabbit farm/nursery 31265 SE 3121h Ave. 544 550350.5178 5029316.128 dairy farm west of 29640 SE Kelso Rd. south side of Kelso Rd. al Frank 545 549671.7447 5029302.051 berry farm Ave. 546 549538.3126 5029139.755 nursery west side of 2871h Ave.

547 548755.0104 5029741.909 Lelpolds Farms Richey Rd .. south of Sylvan Way

on west side of Richey Rd., south of 548 548494.6138 5030281.424 Wastewater Treatment Plant Hwy. 212 on Deep Creek 549 548815.9472 5029902.29 resldentlal area Sylvan Way, east of Richey Rd. 13400 SE Church Rd., east of 282nd Ln., on the south side of 550 549158.5233 5030123.726 Eastman! Bible Church Church Rd. 27995 SE Church Rd .. west of 551 549135.8048 5030228.503 rural residence & shop 285th Ave. on north side 28500 SE Church Rd., west of 552 549323.0958 5030135.166 rural residence & shop Frank Ave., on south side Hammond's Century 21 on north side of Church Rd., east of 553 549485.0386 5030232.49 Development 2851h Ave. 13250 SE 2851h Ave., on east side 554 549315.6263 5030379.111 abandoned vehicles of street 555 549103.8621 5030405.55 Vanport Lumber 285th Ave. and Spring Rd. Boring Bark and Topsoll - possible 556 548833.963 5030608.233 project Richey Rd., south of Hwy. 212 Boring, Fireman Way, Wally Road, School Avenue'Dee Street, and 557 548635.0831 503081 1 .262 rural residential 257th Avenue Notes. {1}Un!versal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 17 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

558 548219.2203 5030613.8 stable 11691 SE 272nd Ave.

located across from 11461 SE 559 548340.754 5031164.7 business/commercial buildings 272nd Ave. - on east side of road 560 548191.9932 5031503.086 Maler Nursery 11330 SE 272nd Ave. located across from 11330 SE 561 548304.4726 5031493.422 abandoned poultryfarm 272nd Ave. 562 548247.741 5032051.971 creek crossing/wetland area Haley Rd., east of 272nd Ave. located on the north side of Haley 563 548420.1585 5032235.273 pasture land - cattle Rd.

located on north side of Haley Rd., 564 548769.1846 5032245.96 green houses across from 27293 SE Haley Rd. 27797 SE Haley Rd., on south side 565 548667.4342 5032124.264 R.V. repair shop of Haley Rd. northwest corner of Haley Rd. & 566 548993.742 5032239. 728 bird farm 282nd Ave. north side of Haley Rd., east of 567 549105.8202 5032243.159 stable 282nd Ave. north and south side of Haley Rd., 568 549243.8855 5032254.093 rural residential east of 282nd Ave. located on the south side of Haley 569 549478.476 5032129.283 Good Shepherd Church Rd., east of 282nd Ave. northwest corner of Haley Rd. & 570 549842.4586 5032298.638 commercial nursery Hwy. 26 southwest corner of Haley Rd. & 571 549968.8455 5032262.88 business Hwy. 26 Hwy. 26, approximately 1/4 - 1/2 mile south of Haley Rd. on west 572 550139.2555 5032083.673 stable/equestrian center side of Hwy. located on the east side of Hwy. 26, 573 550574.9393 5031852.841 rural res!dentlal south of Haley Rd. located on east side of Hwy. 26, 574 552594.9401 5030048. 798 nursery south of Compton Rd. located on the east side of Hwy. 26, 575 553154.447 5029657.147 commerclal nursery north of Kelso Rd. southwest corner of Kelso Rd. & 576 553169.9197 5029361.012 foodcrops - berries Hwy. 26 located on the east side of Hwy. 26, 577 553826.7385 5029236.027 mobile home park south of Kelso Rd. located on the west side of Hwy. 26, 578 554259.3105 5028669.167 Oregon Forest Service Fleet Center north of Jarl Rd. located on the northwest corner of 579 554361.933 5028553.422 Church of the Nazarene Hwy. 26 & Jarl Rd. east and west sides of Hwy. 26, 580 554951.207 5028255.048 Sobella Farms Nursery south of Jar! Rd.

U.S. Forest Service Building Visitor located on the southwest side of 581 555129.3397 5028042.849 Center Hwy. 26, northwest of 362nd Dr. wood product manufacturing located at the southeast corner of 582 555537. 7254 5027837.702 Industrial site 362nd Dr. & Hwy. 26 Note (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929·1 127 are not available. page 18 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 41 00591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER. WATER · CLACKAMAS

· . - . · · - . . · ..· .· ' · . _ -_ ·. R-eferOnCe- . · --- << - __<,- , __ ,, ' : . - - . •• .· - ,_ - No.• :--' ::::: •• · . i> i Poten.tia1sen.lil1ll1nantso:tlrce. ;. .. · · .. · . ··· .·• . ... · Ta�le3J Coordinate :Coordhiate .< < >>• fll.ame>•· . • 1·. · ApproxlmateLocat.lon .. ···· ·.

located on the south side of 583 555310.5922 5027718.867 Industrial site Industrial Way, west of 362nd Dr.

located on the south side of 584 555174.4788 5027853.096 industrial site - nursery Industrial Way, at west end of street 585 555413.7132 5027576.921 Quality Tank 16911 SE 362nd Dr. located on the east side of 362nd Dr., between Barnum Rd. & Skogan 586 555738.4349 5027316.474 resldentlal area Rd. 587 555457.7698 5027004.558 rural residential 362nd Dr., south of Skogan Rd. located on the southwest side of 588 555424.0861 5026601.439 sheep ranch 362nd Dr. at Colorado Rd. localed on the east side of 362nd 589 555536.068 5026598.162 green houses Dr., south of Colorado Rd. 590 555547.5717 5026222.643 nursery 15411 SE 362nd Dr. located on lhe west side of 362nd 591 555402.2559 5026020.349 tilled farmland Dr.

located on the east side of 362nd 592 555521.8976 5025767.03 pond Dr., south of Gunderson Rd.

localed on lhe west side of 362nd 593 555302.2841 5025621.599 rural resldenllal Dr., south of Gunderson Rd. located on lhe west side of 362nd Dr., north of the South Fork of Tickle 594 555437.146 5025309.302 egg farm Creek located at the northwest corner of 595 555417.81 5025084.65 pasture land - came 362nd Dr. & Hwy. 211 located at the northeast corner of 596 555549.3842 5025088.68 pasture land 362nd Dr. & Hwy. 211 localed on lhe south side of Hwy. 597 555553.2185 5024963.506 foodcrops - berries 211, east of 362nd Dr. located at the southwest corner of 367th Ave. & Hwy. 211, east of 598 555743.988 5024975.751 nursery power lines located on the east side of 367th 599 555974.6077 5024 771.863 rural resldence/foodcrops - berries Ave., south of Hwy. 211 located on lhe west side of 3671h 600 55581 1.4492 5024714.127 nursery/foodcrops - berries Ave. rural residence/machfne 601 556214.5863 5024680.444 shop/stable 37765 SE Trube! Rd.

located on the south side of Trube! 602 556343.4035 5024565.501 pasture land Rd., east of Oldenburg Lane north and south sides of Trubel 603 556444.1775 5024938.06 rural residential Rd./Siebert Ln. located on the south side of Trube! 604 556957.2076 5024551.38 nursery Rd, east of Siebert Ln.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 19 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

. - . . --- ': ::__.: ,· Ret�r-eru;:�:'_-1 - -- " . - - - - , -- -- -: - -- ' - - <_._:·.'-, ' _,.';/_-·f':__ -_.;,,_-;-::·:>'. :> - - - .•. • urr,,.111y ·.· - :., ',i;N'.§_((S,ee_ :- I UTMl'l)(c ·••.· ····• . .•.. ••· Potentlal•Contam· lnanrsource.·· ; . . - - . _ . -- . . - ."";./_ -- - .• ->:··- -:\ -\ . • - - - . . • • . ·'< . _ . •• - - - • - >•T•bl�. �r •. coofQinatii ----·co,or�loate_ - . ·.••· Name ····•· { .•• A�pr

fertilizer spreader In creek pasture - located on the south side ofTrubel 611 558545.5441 5024580.227 possible project Rd., west of Langersand Rd. located at the southeast corner of 612 558736.5105 5024586.078 rural residential area Langersand Rd. & Trube! Rd.

located on the south side of Trube! 613 559085.5497 5024596. 773 foodcrops - berries Rd., east of Langersand Rd.

located on the north side of Trube! 614 559134.6009 5024717.166 rural residence Rd., easl of Langersand Rd.

located on the south side of Trube! 615 559402.1958 5024600.073 pasture land Rd., east of Langersand Rd. located across from 41206 SE 616 559424.5532 5024726.05 farmland - cultivated crops Trube! Rd., on north side of road located on the north side of Trube! 617 560348.0106 5024714.718 rural residence - Christmas trees Rd. at Fliwood Rd. located on the south side of Trube! 618 559924.6261 5024543.528 clearcut area - possible project Rd., west of Fliwood Rd. 619 560752.6689 5024641.457 Fliwood Elementary School 42900 Fliwood School Rd. across from Flrwood Elementary 620 560696.5429 5024751.921 stable School located at the east end of Trube I 621 560902.4266 5024698. 785 large shop buildings Rd., east of Fliwood Rd. located at the southeast corner of 622 560630.2907 5024973.953 commercial site Hwy. 211 & Fliwood Rd. located on the west side of Fliwood 623 560503.0768 5024389.931 rural residential - fruit orchard Rd., soulh of Trubel Rd. across from 42801 SE Music Camp 624 560785.5173 5023778.526 pasture land Rd. located on the south side of Music 625 560977 .1907 5023771.291 rural residential area Camp Rd. located on the east side of Music 626 561204.8885 5023652.977 clearcut area - intermittent stream Camp Rd. located on the east side of Music 627 561201.8189 5023534.296 pasture land Camp Rd.

Notes: (1 )Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 20 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 41 0CCLACKAMAS RIVER WATER - CLACKAMAS

- - _. - .: ,' " - ., ·-- _ · - , .. - - - -:- - ReJe_r_en_pe: .. . · .. I:-. - ·· · > . .. • . · · · 'l'l6:<••� ·••• · · UTl\ll111y. Potent1ai o�ta 1�anf .o rce • . � > lJTMl1lx. · · .•• •• F 111 � u • . i · · e 1 • .. • > . ·• · · \.• · • Appr9xlmate •••• · tabl 3) -·--coordinate · .coor•. locau0n

located on the south side of Music 628 561201.0792 5023349.536 pasture land - Christmas trees Camp Rd., after road curves east

located on the south side of Music 629 561359.3584 5023347.679 rural residential area Camp Rd., west of 442nd Ave.

located on the north side of Music 630 561868.5262 5023515.099 foodcrops - berries Camp Rd., east of 442nd Ave.

located on the west side of 442nd 631 561851.9863 5022980.496 rural residence Ave., south of Music Camp Rd.

located on the west side of442nd 632 561851.7451 5022769.533 rural residence Ave., south of Music Camp Rd.

unmanaged deciduous forest lands located on the west side of 442nd 633 561826.9251 5022505.077 creek Ave., south of Music Camp Rd. located on the east side of 442nd 634 561847.4985 5022261.523 stable - barn Ave., north of Pagh Rd. located on the east side of 442nd 635 562002.835 5021719.077 stable - arena Ave., north of Pagh Rd. located at the northwest corner of 636 561841.736 5021812.912 Christmas trees Pagh Rd. & 442nd Ave. located at the northwesl and northeast corner of Pagh Rd. & 637 562007.474 5021567.709 Christmas trees 442nd Ave. 44174 SE Pagh Rd., on norlh side 638 561907.3457 5021393.009 Blooming Hills Nursery of road

located on the norlh side of Pagh 639 561672.1335 5021537.617 nursery Rd., west of 44174 SE Pagh Rd.

localed on the soulh side of Pagh 640 561590.2846 5021403. 109 junk yard Rd., west of 44174 SE Pagh Rd. rural residential area - possible located on the norlh side of Pagh 641 561039.5299 5021518.232 project Rd. pasture land, cattle - possible localed on the soulh side of Pagh 642 561037.0757 5021379.45 project Rd. rural resldentlal, pond - possible located on the soulh side of Pagh 643 560740. 7237 5021370.369 project Rd.

644 560380. 1267 5021517.842 green houses - nursery located west of 42280 SE Pagh Rd. 645 559815.642 5021434.394 Fire Department 24545 SE Flrwood Rd. located on the east side of Flrwood 646 559981.7886 5021175.79 pasture land - cattle Rd., south of Pagh Rd. localed on the west side of Flrwood 647 559813.2395 5021084.963 nursery Rd., south of Pagh Rd.

located on the east and west sides 648 559811.9885 5020906.892 rural residential - pasture land of Forwood Rd .. soulh of Pagh Rd. Notes. (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 21 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

- - . -- - •.· '•.. - . _ - - - . . > R�f��e-nce - . _-. - < - 'l · >: 01 t I -- No. (see •· UtM X• • >, . UTM. .'f, .· · Potentiaicoritaminant Source • . --, - . - - • •. '. : · l'abte a) . coo.rdina.te. •coo.rciinate -,.,,;,·-:,_.;N�hi�_-.-: .·· ... ·.··· · · •• App[Oxlrniite t()c.ation > · located on the west side of Fi!Wood 649 559851.3401 5020697.141 pasture land - horses Rd. 23737 SE Firwood Rd., on both 650 559843.4634 5022028.789 nusery - junk yards sides of road north on Firwood Rd. - forest Is east rural resldentlal - unmanaged of Bornstedl Rd. Dead End with 651 559977.9886 5022593.223 deciduous forest lands Firwood Rd. located on the east side of Flrwood 652 559977.1517 5023048.336 farmland Rd. at Algeter Rd.

located on the west side of Firwood 653 559479.4786 5023580.289 pasture land Rd .. north of Corndog Rd. located on the east side of Flrwood 654 559988.7 078 5023536.752 foodcrops - rhubarb Rd. al Corndog Rd. located on north side of Flrwood 655 5601 18.7149 5023810.831 rural resldenllal area Rd., east of Music Camp Rd!

located on the south side of Firwood 656 560240.4231 5023709.083 foodcrops - berries Rd., east of Music Camp Rd. located south of Tickle Creek on Firwood Rd., around 21385 Flrwood 657 560517.8147 5023909.028 pond Rd. located on Flrwood Rd. al 4271h 658 560672.7309 5023807.993 large pond Ave. located on the east side of Flrwood Rd .. north of Intersection with 427th 659 560800.8717 5023924.104 llama farm Ave. located at southwest corner of 660 557417.3204 5024598.399 pasture land - cattle Trube! Rd. & Bornstedt Rd. located at southeast corner of 661 557522.2915 5024615.028 pasture land Trube! Rd. & Bornstedt Rd.

located on west side of Bornstedt 662 557412.2951 5024334.553 pasture land Rd., south of Trube! Rd.

located on the east side of 663 557537.025 5024134.128 pasture land - horses Bornstedt Rd., south of Trubel Rd.

located on the south side of Boitano 664 557369.4469 5023792.749 junk yard Rd., west of Bornstedt Rd.

located on the north side of Bollano 665 556977.3891 5023892.617 stable - Christmas trees Rd., west of Bornstedt Rd. located on the south side of Boitano 666 556894.6222 5023798.018 pasture land - Christmas trees Rd. located on the north sfde of Boltano 667 556645.5163 5023968.417 pasture land Rd.. west of Poe Rd. 668 556675.3481 5023850.441 nursery 37780 SE Bollano Rd.

located on the south side of Boltano 669 556484.9882 5023824.795 pond Rd., west of 37780 Boitano Rd. Notes. (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 22 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

:_ ·· .· - '::' �·.::,,·_-__ ,-' '""''·' - : ,, · · : - ; '_;.'/> R�f�re�.ce . . . - ' ·.·' • •• Jfoi;(see t o n rce · • P nti l q �� tnt SQ · ·. . · '. �e a � � •·. .•.. . .· · •"."Table3) .. c��J:��;. > c�!�J]t�;e/ , •• · Approxlm�i. 4lii�iloncL • located at west end of Boltano Rd., 670 555939.2902 5023775.156 cattle ranch on south side 671 556560.8611 5023497.58 rural residential area Cottontail Drive & Cottontail Lane located on the north side of Hwy. 672 555140.5549 5025089.266 agricultural land 211, west of 362nd Dr. 673 555170.6815 5024971.604 precast cement business 35003 SE Hwy. 211 located on the south side of Hwy. 674 554264.327 5024633.818 agricultural land 211, west of Brinkley Rd. located on the south side of Hwy. 675 553938.1093 5024525.058 Sandy Farms 211, west of Brinkley Rd. located on the south side of Hwy. 676 553761.2573 5024486.414 Sandy Cemetery 211, west of Brinkley Rd. located on the north side of Hwy. 677 553862.3356 5024839.165 Christmas trees 211. west of Brinkley Rd. located on the south side of Hwy. 678 553324.3078 5024539.184 clearcut area - possible project 211 at Deep Creek located on the north side of Hwy. 679 552768.3009 5024179.208 Collin's Retreat Center 211 on Deep Creek located on the east side of Judd 680 552520.3759 5023664.051 pasture land - Christmas trees Rd., south of Hwy. 211 located on the west side of Judd 681 552352.941 5023526.927 rural residential area Rd., south of Hwy. 211 located on the north side of Howlett 682 552678.807 5023438.135 cattle ranch Rd., east of Judd Rd. located on the south side of Howlett Rd., between Judd Rd. & Smokey 683 552675.3426 5023332.248 Christmas trees Ln.

located on the east side of Howlette 684 553190.4649 5023315.098 foodcrops - berries Rd., south of Shadow Rd.

located on the west side of Howlette 685 553025.487 5023316.753 crops - hay Rd., south of Shadow Rd.

located on the west side of Howlett 686 553081.5682 5022988.628 egg farm Rd., south of Shadow Rd. located on the east side of Howlett 687 553503.913 5022546.731 rural residential area Rd. off Cat Track Rd. located on the east side of Howlette 688 553575.0506 5022383.987 oil tank - equipment Rd. - 23300 area located at the northwest corner of 689 552404.0602 5023798.889 Fire Station Judd Rd. & Hwy. 211 located on the north side of Judd 690 552411.3094 5023990.248 pasture land Rd., west of Hwy. 211 located on the north and south sides 691 552180.9973 5024194.148 rural residential area of Judd Rd. located on the north side of Judd 692 551816.9885 5024453.399 unmanaged deciduous forest lands Rd. & ldlewlne Rd. north and south sides of Judd Rd., 693 551305.7441 5024563.037 rural residential area west of Norse Ave.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 23 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

,. : . . • •· - - - · - - - · . · ·· · - _ , ,, � _ _ , • ·: . · _ _ _ Reference - -.'-" - ' - • .uTMi11 X' 11 < •· • · No. (s�. UTM i.y,, .. - - •• ·. • \ 1entlal9oritarn- - lnanl- SC>··•u ·.rce - :• •) - . - . / ·. - . · > .. •· •:: :,,:- ·.· .•. : ;•: coordinate Coordlnat.e · - _ . :.r�tile3) . . N.ame< ··APP•i!xlmatetC>caUon located on the north side of Judd _ < 694 550221.4409 5025307.798 unmanaged deciduous forest lands Rd., west side of power lines

located on the south side of Judd 695 549814.3674 5025460.255 gravel pit Rd., on west side of power lines Gerber Court, located on the north side of Judd Rd. - west side of 696 549119.5564 5025979.773 rural residential area power lines located on the south side of Judd 697 548592.156 5025970.031 unmanaged forest lands - pond Rd., west of Gerber Court located on the north side of Judd 698 547864.6072 5026264.49 pasture land Rd., west of Holst Rd. located on the south side of Judd 699 547744.679 5026089.194 rural residential area Rd. at Amslgger Rd. north side of Judd Rd. at Amslgger Rd. - east side of Amsigger, north of 700 547749.5065 5026359. 735 rural res!dentlal area Judd east side of Amslgger Rd., north of 701 548139.9829 5026958.504 drainage Yewwood Dr. east side of Amsigger Rd., north of 702 548372.1275 5027770.08 foodcrops - berries Yewwood Dr. located on the west side of Amslgger Rd., north and south of 703 547200.3654 5027707.692 nursery Rebman Rd. agricultural land - rural residential 704 548361.4734 5028765.356 area 15535 SE Amslgger Rd.

268th Court, located off north side 705 54 7979.1807 5029413.016 rural resldential area of Kelso Rd., west of Amslgger Rd.

26460 SE Kelso Rd., on north side 706 547794.6156 5029407.366 Hood View Academy of Kelso Rd.- west of 268th Ct. 707 547874.007 5029403.09 Hoodvlew Church 26775 Kelso Rd.

708 547510.7662 5029418.492 rural residential located west of 26775 SE Kelso Rd. located on the west side of 262nd Ave., south of Kelso Rd. - west of 709 547429.329 5028842.295 rural residential - ponds golf course located on the east side of 262nd Ave., south of Kelso Rd. - west of 710 547541.4083 5028845. 726 rural residenUal with shop golf course located on the north and soulh sides of Hoffmeister Rd., east of 222nd 711 544469.807 5030119.212 rural res!denlial area Dr. 712 544914.1142 5030413.257 Christmas trees 22850 SE Hoffmeister Rd. located on the south side of Hoffmeister Rd., east of Hoffmeister 713 545055.8608 5029815.85 jurisdictional wetlands Court located on the north and south sides 714 545277.0929 5030127.456 pasture land of Hoffmeister Rd.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 24 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 -OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

· - - - · __ - · · - .·. . . · e e . : : ' :- ' : --- . - _ ,, -_ ·:· '::,, _- --:' - _- : _-:-". _ - · R rerenc · . _ ,, - : - -- : ''/--. · >>; : .: -- . - .: , --. •••·.·· see ·.• . UT.M1'lX- > / UTM1'l Y, ··.•. x <' ·· f'l(i)( . 1 Pot�nt1�19!>"tamlnant 8t>urce ci i/; 5. C; . · · C or nit e •· 1 . : • ••. i • . < . • · . Tablea) ·· o dl t · · Coordinate. Name ··· . . Ap�i�x1n1ate Lpcatlon ·· located on the south side of 715 545402.7581 5030065.458 wetlands Hoffmeister Rd. located on the north side of 716 545497.1482 5030208.571 rural residential area Hoffmeister Rd. natural gas facility and agricultural located on the south side of 717 545542.6047 5030077.968 land Hoffmeister Rd.

located along Hoffmeister Rd., 718 544947.8622 5030117.38 Northwest Pipeline between 222nd Dr. & 242nd Ave. located 300 feet west of 242nd Ave., on the south side of 719 545798.0789 5030077.557 pond - wetlands Hoffmeister Rd. pump repair business - possible located at the southeast corner of 720 545879.3038 5030112.965 project 242nd Ave. & Hoffmeister Rd.

located on the north side of 721 546016.3818 5030215.927 rural resldentlal area Hoffmeister Rd., east of 242nd Ave.

located on the south side of 722 546086.6975 5030069.929 Christmas trees - pasture land Hoffmeister Rd., east of 242nd Ave. drainage, pasture land, cattle - located west of 24935 SE 723 546255.6614 5030206.79 possible project Hoffmeister Rd. located across from 25529 SE Hoffmeister Rd. - on the south side 724 546292.8329 5030068.008 Misty Meadow Kennels of Hoffmeister located on the north and south sides of Hoffmeister Rd., west of 257th 725 546711.8167 5030113.755 Christmas trees Ave. bridge/concrete barrier - possible located on Richey Rd., south of 726 548866.9742 5030525.719 project 212th Ave. Deep Creek crossing

located on the west side of Richey 727 548797.6964 5030358.986 Boring Wastewater Treatment Plant Rd., 1/2 mile south of Hwy. 212

located on the west side of Richey 728 548653.8109 5029950.673 rural residential area Rd., from Church Rd. to Kelso Rd. located on the west side of Tickle 729 550006.6467 5028838.282 agricultural land Creek Rd. located on the east side of Tfckle 730 550170.8596 5028851.54 ls/le Nursery Creek Rd. located on the east side of Tickle Creek Rd., on the north side of 731 550365. 7952 5028140.223 CRBC Tree Project Deep Creek

located on the west side of Tickle 732 550184.579 5028134.675 unmanaged forest lands Creek Rd., north of Knox Rd. located on the east side of Tickle 733 550148.5932 5027697.043 nursery Creek Rd., sou/h of Deep Creek 29421 SE Knox Rd., on the south 734 550012.7408 5027832.805 pump house side of Knox Rd.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 25 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 -0REGON CITY SOUTH FORK WATER BOARD PWS # 41 00580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

, >:_:R_Oference . >No, (see . UTM1'lX. • 'T��lli3) Coordinate located on the south side of Know 735 549843.2726 5027712.387 rural residential area Rd. unmanaged deciduous forest lands located on the north and south sides 736 549671.7995 5027657.448 rural residential area of Knox Rd. located on the south side of Knox 737 549480.44 5027445.518 ponds Rd. located on the north side of Knox 738 549104.33 5027343.467 stable Rd. located on the north side of Knox 739 548992.477 5027233.044 foodcrops - berries Rd. at creek crossing

located on the south side of Knox 740 548990.0531 5027043.359 pasture land - sheep - pond Rd., east of creek crossing

located on the north side of Knox 741 548646.9942 5027206.006 unmanaged deciduous forest lands Rd. and at the end of Knox Rd. located on Tickle Creek Rd., south 742 550003.1015 5027609.977 unmanaged deciduous forest lands of Knox Rd. to Hillyard Dr. 29600 SE Hillyard Dr., on the north 743 550145.5094 5027260.113 foodcrops - berries side of street located on the south side of Hillyard 744 550268.5117 5027016.349 stable Dr., to end of road possible fish passage barrier - located north of 17650 SE Tickle 745 550527.5148 5026900.818 possible project Creek Rd.

located south of 17650 Tickle Creek 746 550508.8969 5026702.407 rural resldential area Rd., on the east side of street

located on the south side of Holst 747 550308.8101 5026506.67 foodcrops - berries Rd., west of Tickle Creek Rd. located on the north side of Holst Rd., west of Tickle Creek at end of 748 550181.3703 5026626.533 stable road 749 550684.1039 5026625.464 Moren Stable & Residence 17851 Tickle Creek Rd. located on the east side of Decker 750 550980.5 5026642.77 foodcrops - berries & filbert orchard Rd., north of Tickle Creek drainage/headwaters - possible located on the west side of Decker 751 550856.3424 5026655.43 project Rd., north of Tickle Creek

located on the soulh side of Tickle 752 551075.2461 5026505.444 Rumsey Cattle Ranch Creek Rd., east of Decker Rd.

located on the north side of Tickle 753 551285.5703 5026635.649 stable - pasture land Creek Rd., east of Decker Rd. located on the west side of Fosberg 754 551425.8273 5026903.631 pasture land Rd. localed on the east side of Tickle 755 551536.1085 5026527.786 pasture land - grass Creek Rd., south of Fosberg Rd.

located on the west side of Tickle 756 551406.8018 5026449.75 nursery Creek Rd., south of Fosberg Rd. Notes. (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 26 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

_ . _ -R_ _ , " , - - - - · - -- _ - efe��"-_ce _._ ------<_. :-- > ,,, ; : _ _ · - _ :<>, :_ � ' __ _, _ . i>otentlal Co nant Source ---:- :- -- _ .. ��b�� C�:��;;;. • •• c�:��:�:;e I ��':::'� .. .. ·•·· •,i\pproii�a!elgc�tl�n 757 551410.8399 5026317.878 farm machinery repair 18191 SE Tickle Creek Rd. located south of 18191 SE Tickle Creek Rd., on north side of power 758 551491.6576 5026097.818 hay fields - nursery lines

rural residential area - unmanaged located on the south side of Tickle 759 551 853.433 5025861.669 forest lands Creek Rd., south of the power lines

located on the north side of Tickle 760 552030.5597 5025990.858 nursery Creek Rd., souih of power lines located on the east side of Tickle 761 552352.9912 5025695.584 farm Creek Rd. located on the west side of Tickle 762 552327.4098 5025455.805 unmanaged forest lands Creek Rd. located on the south side of Tickle 763 552587 .1801 5025315.301 abandoned farm Creek Rd. located on the south side of Tickle 764 552733.0735 5025130.461 unmanaged forest lands Creek Rd. Big Valley Mobile Home Park - 765 553027.8579 5024652.958 possible project located at the end of Leewood Lane 766 555280.9802 5025092.957 Pioneer School 36001 SE Hwy. 211 located off Gunderson Rd. & Volmer 767 554928.5394 5025840.308 rural residential area Way pasture land - drainage - posslble located north of Gunderson Rd. to 768 555106.9252 5025928.385 project Volmer Way located on the south side of 769 554551.9227 5025754.696 pasture land Gunderson Rd. located on the south side of machine shop - chrome wheel Gunderson Rd., east of creek 770 554105.2374 5025806.861 storage crossing located on the north side of Gunderson Rd., west of creek 771 553929.9664 5025875.875 Haul Trucking Business crossing foodcrops - berries and unmanaged toward west end of Gunderson Rd., 772 553768. 7301 5025755.401 forest lands on south side of street

located at west end of Gunderson 773 55361 1.4791 5025783.508 rural residence with shop Rd., on south side of street located on the east side of Volmer Way, at end of slreel - off 774 554383. 7696 5026128.77 Vollmer Excavating Gunderson Rd. located al 362nd Dr., soulh of 775 555480.4109 5026384.896 creek crossing Colorado Rd. located at the northwest corner of 776 555429.4606 5026704.64 sheep ranch - pasture land 362nd Dr. & Colorado Rd. located on the south side of 777 555094.9691 5026587.394 horse ranch Colorado Rd. located on the north side of 778 554943.1706 5026706.206 wetlands - possible project Colorado Rd.

Notes: (1 )Universal Transverse Mercator {UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 27 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

. . . . . < ·.· · . ·· • . .. I • • · . . ... ·· - . · . . . .. ••· - ./ . ·· .· . . . - . . . Reference . · · ...... I i .· · ·. • No.(see UTM1'!)(. < UIM111Y• . l'otential�?ntaminant Sou�ce I .. · · · · · rd · .·. • . ·. • • Table 3) · Goo lnate<.• coo.rillnate 1 . .· .· . . Name •' • • 1 • Approximate Loc�tidn. •

stream crossing - possible erosion eastern most stream crossing on 779 554466.1117 5026675.132 control project Colorado Rd., west of 362nd Dr. located on the north and south sides 780 553585.7528 5026623.476 rural residential area of Colorado Rd. localed on the north side of 781 553872.6145 5026673.415 creek crossing Colorado Rd., west of 362nd Dr. located on the north side of 782 553505.6362 5026810.634 rural residential - nursery - stable Colorado Rd., west of 362nd Dr. rural residential area - possible 783 553236. 7325 5026711.86 culvert project Moonbeam Drive rural residential - unmanaged forest 784 553095.9728 5026460.323 lands Twilight Lane located on the north side of 785 552942.965 5027156.163 rural residential Colorado Rd. around 329th Place

located on the south side of 786 552745.553 5027141.886 logglng site Colorado Rd., west of 329th Place passable culvert - unmanaged located on gravel road off northwest 787 552404.3121 5027782.576 deciduous forest lands end of Colorado Rd. perched culvert - possible culvert located on gravel road off northeast 788 555719.8494 5026639.459 project end of Colorado Rd. located on the north side of Hwy. agricultural land - possible creek 211, between 362nd Dr. & Arletha 789 556428.6307 5025564.954 restoration project Court

pasture land - transitional timber Arletha Court, off south side of Hwy. 790 556894.9496 5025678.009 lands 211 - west of Bornstedt Rd.

pasture land, foodcrops, gun club - located north of Hwy. 211, between 791 557142.6549 5025941.362 possible project Arletha Ct. & Bornstedt Rd. located on the north side of Hwy. 792 557510.2402 5026043.163 Wonderland Mobile Home Park 211, east of Bornstedt Rd.

rural residential area, mini ranches - north and south sides of Bornstedt 793 557482.3435 5025341.775 possible culvert project Rd., Hwy. 211 to Trube/ Rd.

east and south sides of Bornstedt 794 557832.1773 5023605.116 nurseries - pasture land Rd., east of Boitano Rd. located at northeast end of Winery 795 55851 1.251 5022694.611 abandoned winery Rd., off Bornstedt Rd. located at the southeast corner of 796 558021.0215 5022555.825 stable - clearcut area - pasture land Winery Rd. & Bornstedt Rd.

located at south end of Moxie Ln., 797 557299.9687 5022418.504 small airport west of Winery Rd. & Bumpy Ln.

agricultural land - rural residential located on the south side of Rude 798 557847.8175 5021751.207 area Rd., south of and off Bornstedt Rd.

799 559481.844 5022229.579 rural residential area Bornstedt Rd., west of Flrwood Rd. Notes: (1)Unlversal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 28 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

·.• ·. ·. .· Reference . ·. ·. < ..· . • · _ - , ., •••• . · -,,-:_·:'- )': ':-·-·> ·:., ' " . ·No. (see lJTMl'l x• .· 0TM11ly. ·.· !"ote.ntlal•Conta ln�nt Sourc.e • · · - !ll . · e •. · , .--· _ --: ,--:>- �:::-;.__: ___ :_:: '< i, i Tabl 3) C:oordl.riate . c9ordinate . _ ---:N�_me<> Approx1ii\at; i:icatron •.;( ; .• machine shop/foodcrops - located at southwest corner of 800 559673.3049 5022169.598 blueberries Borns!ed! Rd. & Fiiwood Rd. located on Flrwood Rd., south of 801 559946.749 5022120.36 pond - possible project Bornstedt Rd. creek crossing located off Flrwood Rd., south of 802 559986. 7076 5021890.813 rural residential area Bornstedt Rd., on Dover Court

located on the east side of Flrwood 803 560048.1019 5022304.85 foodcrops - raspberries Rd., north of Dover Court located on the east and west side of Flrwood Rd., between Bornstedt & 804 559892.6611 502281 1.014 rural residential Trube! Rd.

pond on creek-no passage-possible located on the west side of 805 558622.0825 5024997.467 project - rural residential area Langersand Rd., north of Trube! Rd.

urban and high density residential area along the east side of 806 558498.392 5026815.431 area Langersand Rd., south of Hwy 26 Melnlg Memorial Park - possible located east of Melnlg Ave. & Hwy. 807 557993.7817 5026837. 769 parking ioVcreek project 211 rural resldentlal - pasture land - located at the end of Smokey Lane, 808 553014.7559 5023627.366 horses - pond on the north side rural residential area - foodcrops - located on Shadow Rd., north of 809 553272.7652 5023544.423 pasture land Howlett Rd. Land Rd. off Howlett Rd., and 810 553387.1218 5022229.163 rural residential area Shadow View Ln. off Land Rd. located on Woodle Rd., off Howlett pasture land, cattle - possible Rd., project site on north side of 81 1 554086.8122 5021451.281 project road located on the west side of Crane 812 554598.8399 5021425.806 filbert orchard Rd., north of Woodle Rd. located on the east side of Crane 813 554810.4364 5021514.594 Christmas trees Rd., north of Woodle Rd. rural resldentlal area - possible 814 554944.744 5022235. 707 culvert project Gold Rd., off Crane Rd. 815 555168.4959 5022465.098 rural residential area Bronze Rd., off Gold Rd. located on the north side of Wildcat 816 554144.7334 5021172.595 rural residential area - pasture land Mountain Drive located on the south side of Wildcat 817 553513.02 5020895.351 unmanaged deciduous forest lands Mountain Drive

located on the north side of Wildcat 818 553170.508 5021049.786 rural residential - possible project Mountain Dr., east of Brevl Lane located on Brevi Ln., north of 819 552890.6057 5021041.216 rural residential area Wildcat Mountain Drive located on Dale Ln., north of Hwy. 820 549119.9709 5024123.91 pasture land - horses 224 located on the north side of Hwy. 224, across Hwy. from Paul Bunyan 821 548831.0482 5024380.279 shooting range Ln.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordlnates for Ref. No.'s 929-1127 are not available. page 29 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410C CLACKAMAS RIVER WATER · CLACKAMAS

- ' - - -. · - " . _ _ - - _-_ - -' ,, __.: -,- · · _ Refetenc� ," · , " __ : __ ,., -' • , _ 11 111 > • _ . No. {see . •UTM1 .% UTM Y: •. •• PofonllalCon lnant Sou�c ; ·. · . · • ·, . .. [�IJl f .': < )> ' . ·· . - - _ · . · rabte 3) •. '•.•Go6(dlllate Coordinate •. :'':":_:-(_ - , ':.'· , ::NSJn_Et:<-.-> ·< :·> .•• • flpproximate Location · · rural residential area - agricultural Hwy. 224, between BPA power lines 822 548118.6047 5025037.66 land - miscellaneous businesses & Amslgger Rd.

located on the north side of Hwy. 823 548273.601 5024923.821 Eagle Iron Works 224, southeast of Bartlemay Rd. pasture land - cattle In stream - east and west side of Amsigger Rd., 824 547334.0236 5025890.673 possible project north of Little Creek

825 548362.5731 5026548.601 rural resldentlal area north side of Holst Rd., off Judd Rd. Yewwood Drive, on west side of 826 547294.0637 5026548.819 rural resldential area - businesses Amslgger Rd. located at the end of Yewwood Dr.. north of Hwy. 224 & Bakers Ferry 827 545883.2701 5026756.219 Trestle Glen Camp Rd. located at the northwest corner of 828 547243.4615 5025841.566 Elle Construction Equipment Amslgger Rd. & Hwy. 224

located on the south side of Hwy. 829 546999.9049 5025821.003 Barton School 224, east of Bakers Ferry Rd.

located on the south side of Hwy. 830 546364.5425 50261 11.581 gasoline station 224, east of Bakers Ferry Rd.

ceramics business - construction located on the west side of Bakers 831 546284.0022 5025944.198 equipment Ferry Rd .. south of Hwy. 224

located on the north side of Hwy. 832 546101.1388 5026321.175 pasture land 224, west of Bakers Ferry Rd.

located on the south side of Hwy. 833 545296.5898 5026322. 771 gravel pit 224, west of Bakers Ferry Rd.

located on north side of Royer Rd. 834 545095.7411 5027068.357 tractor repair - pond off 232nd Dr., north of Hwy. 224 232nd Dr., south of Deep Creek 835 545222.3258 5027454.497 rural residential area School

located on the east side of 232nd 836 545101.2773 5027754.106 Deep Creek School Dr., south of Ondo Rivera Dr.

located on the east side of 232nd 837 545123.3214 5028757.085 nursery Dr., south of Blue Ridge Dr. Blue Ridge Drive, off east side of 838 545252.8792 5028826.895 rural residential with shop 232nd Dr., south of Hwy. 212

located on the east side of 232nd 839 545133.1386 5029073.806 nursery Dr., north of Blue Ridge Dr. 840 546879.4971 5029107.44 rural residential area Bartel Rd., south of Hwy. 224 Holly View Lane, off north side of 841 546393.4425 5029699.187 rural residential area Hwy. 212 Notes. (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X-and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 30 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410C CLACKAMAS RIVER WATER - CLACKAMAS

· - · ______- - - - - · - ..:- · ,.·.. ·:::-<, -> -.. < R8_ter��ctf --: __ -,�- - - -:: - ".>:-- , _ - .- :, _'< :... _ :-- _ .. _,<' -"_ _ '-: _< �' _ - : __ <- - : :-- ::---: < · U 11) f'1 r: ·i·•···· . TM X- UTM Y- l . . No;(see ot ta· C mln nt • o. u.'. : · ·· <••· ·>· . · . •.·•· P �. n · ·I 0.11.t� � s. ••· · ·., . . , . ,. . . . .· •.. ,. · . • "' .• · Ja�iii3l c;oordJnate Coordinate .. + ..<. . '",Name . . AppfQxlmateJ,;

commercial development and light located on the west side of 282nd 844 548990.3302 5031236.106 truck parls Ave., north of Hwy. 212 and Boring located on 282nd Ave., north of 845 549055.9618 5031462.169 rural res!dentlal area - nursery Boring, south of Haley Rd. located on the northwest side of 846 549780.3642 5022776.903 tree farm Dowty Rd., west of Hwy. 211 located on the south side of Dowty 847 549878.9604 5022483.917 nursery Rd., west of Hwy. 211 located on Dowty Rd., norlheasl of 848 548972.8638 5022306.809 Soloran Tree Farm Blay Rd., west of Hwy. 211 Logan area, off Eaden Rd., east of 849 547339.602 5021644.393 Bonnie Lure State Park Springwater Rd. located on the east side of Dowty 850 549218.0454 5020969.643 livestock Rd., north of Folsom Rd. located on the south side of Folsom Rd., at Dowty & Folsom Rd. 851 549228.0958 5019505.775 Weedln Nursery Intersection

located on the south side of Folsom 852 549903.0273 5019745.617 tree farm Rd., west of Hereford Ln. located _onthe north side of Currin 853 551438.3861 5019862.117 rural residence - large estate Rd., east of Hwy. 211 located on the south side of Currin Rd., east of Hwy. 224, west of 854 552001.0887 5019376.344 livestock Wallace Rd.

managed forest lands - clearcut located on the north side of Currin 855 552826.64 5019257.119 area Rd., west of Five Oaks Rd. located on the south side of Currin Rd., between Wallace & Five Oaks 856 553008.1671 5019023.675 Christmas trees - livestock Rd. 27770 Currin Rd., on the south side of Currin Rd., north of Eslacada 857 553838.4836 5018579.628 Angel Acres Tree Farm Airport located at the northeast corner, at managed forest lands - clearcut the intersection of Copeland & 858 554813.6251 5015197.893 area Currin Rd.

located at the northwest corner of 859 554682.5785 5015206.38 tree farm Coupland & Currin Rd. intersection located on the south side of Coupland Rd., just east of Currin 860 554810.5827 5015098.113 nursery Rd. Intersection located on the south side of Coupland Rd., south of Tracy Rd. 861 556163.323 5015245.619 junk yard - liveslock intersection

Notes: (1 )Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordlnates for Ref. No.'s 929�1127 are not available. page 31 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410C CLACKAMAS RIVER WATER · CLACKAMAS

_ - ·• ___,: - - .. . • . • . • 1---- .. .· ... . · - R0fEfr9hCe - ·. . ·.. .. ··· . . · · . . ·.··•· - · -_ - · - • ·. : --:--�;_:- _ ::'.:-<':,:: : <,: · _::: :;,\ /'.>':'\ !,lo. (�•• ur1111•1 x- •·· • UTMll)y. < •·• Polenua1·con\�11ilna111�o urc.i _,\::;: _ _: : · :_ : _ • • • • < . . • . • · ••·• . · •> rahle 3l · " Co.orcilnate co.ordlnaie. ••.Name : i . / .Approxlmilt�Loc•llon• located at the intersection of Tracy 862 556132.8265 5015425.158 nursery, foodcrops - berries & Coupland Rd. Coupland & Divers Rd., on north & south side Coupland, on west side 863 556499.2754 5015454.974 Christmas trees of Divers 864 556613.3409 5015383. 778 grange 33460 Divers Rd.

located on the west side of Divers 865 556534.9753 5013880.887 nursery Rd., just north of Kemp Rd. located on the west side of Divers Rd., across from Porter Rd. 866 556520.088 5013351.508 Christmas trees Intersection Lacy Ln., located on the north side of Squaw Mountain Rd., east of 867 557551.7225 5012187.754 clearcut area Divers Rd. managed forest lands - clearcut Porter Rd., area to southeast 868 562428.7908 501 1110.361 area Including all hills

located on the west side of Porter 869 561843.4555 5011816.473 culverts - double Rd., north of Squaw Mountain Rd. located on the east side of Porter 870 561983.3312 5011828.379 Roarks Handyman Rd., near stream crossing located on the south side of Porter 871 561239.5278 5012482.688 Mennonite Church Rd., In the town of Porter

located on Porter Rd., at the west 872 560316.8797 5012625.759 Christmas trees end of town, west of Randall Rd. Bouman Rd./Buzz Rd. - east of 873 560530.1894 5013285.906 Christmas trees Doyle Rd., off Porter Rd. located on the south side of Porter 874 558681.6925 5013159.178 Massau Stock Farms Rd., west of Doyle Rd. Peaceful Lane - located off east side of Coupland Rd., north of 875 557611.9256 5014293.712 tree farms Porter Rd.

located on the west side of 876 557482.2314 5013441.633 tree farms Coupland Rd., north of Porter Rd. located on the west side of Coupland Rd., north of Peaceful 877 557101.6223 5014690.554 tree farms Lane located on the east side of Coupland Rd., north of Peaceful 878 557247.441 5014757.209 managed forest lands Lane located on the west side of Tracy 879 556107.1501 5015656.365 junk yard Rd., south of Linde Lane

located on the south side of George 880 560787.6259 5015799.709 Cascade Motor Repair Rd., west of Rainbow Rd. located on the north side of George 881 560336.5097 5015856.617 George Community Church Rd., west of Belfils Rd.

Notes: (1)Universal Transverse Mercator {UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1 127 are not available. page 32 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS · .· .. . · · · . . . __ · ·•; _.> ··· · ? ·· · ·· · ·.. ·.· • - :: ''.• <:';: < .. . •.. ·· · · ··. · · · _ ·. Reterence .• - :- / . .. . ···. .. · UTM11> x.. l)TM111Y· ... Pq!.. ntiaf Cohtamlnant ource• .· . . No. isee . .. ·• · ·S. · •.· • • . . N e .· ··• · .. . Table3) Coordinate I Coi;>rdlnate . / < am · ;flp�r��1!11ateJ,qcaUon

located on the south side of George 882 561082.4865 5015588.941 Christmas trees Rd., west of Rainbow Rd. located on the west side of Rainbow Rd., off the south side of George 883 561874.9864 5014170.943 Eagle Creek Fish Hatchery Rd. 884 563169.2749 5015351.065 commercial forest lands George Rd. to Bissell Rd.

885 563111.1105 5016522.979 agricultural area - farms Clausen Rd., north of George Rd. located at the northeast corner of 886 559654.4756 5016584.752 Fire Station Clausen & Gruberrd Rd.

located off west side of Eagle Fern 887 555785.5001 5018802.949 Eagle Fern Park Rd., south of Wildcat Mountain Dr.

located on the east side of Kitzmiller 888 560428. 7262 5019772.537 Dover Community Church & Kleinsmith Rd. Intersection located on the north side of Kleinsmith Rd., north of Kitzmiller 889 560279.6417 5019902.104 nursery Rd. 890 555856.6152 5020124.211 clearcut area Wildcat Mountain Road located on west side of Eagle Creek Rd., between Creekside Ln. & 891 551224.5732 5020821.632 commerclal buildings Riverside Way located on west side of Eagle Creek Rd., between Creekside Ln. & 892 551235.8175 5020693.331 abandoned plywood mill Riverside Way located on the east side of Eagle Creek Rd., south of Wildcat 893 551317.4646 5020595.535 Eagle Creek Four Square Church Mountain Dr. 25800 Eagle Creek Rd., located on the east side of the road, north of 894 551310.8044 5020345.052 Eagle Crest Mobile Estates Currin Rd. located on the east side of Eagle 895 551271.8035 5020214.908 Eagle Creek Inn Restaurant Creek Rd., north of Currin Rd. located on the east side of Eagle 896 551260.7704 5020107.264 old gasoline station Creek Rd., north of Currin Rd. located on the east side of Eagle 897 551519.2525 5018913.468 Hartman Equine Adventures Creek Rd., norlh of Heiple Rd. located on the east side of Eagle Creek Rd., just north of Currin Ck. & 898 551503.7624 5018712.403 Currin Creek Excavation Duus Rd. 28255 Eagle Creek Rd., located on the west side of the road, south of 899 551445.1806 5018295.711 Horse Hospital Ely Rd. located on the east side of Eagle Creek Rd., south of Ely Rd., north of 900 551537.6377 5018312.869 junk yard Duus Rd. located on the east side of Eagle Creek Rd., south of Ely Rd., north of 901 551526.6044 5018205.225 mobile homes Duus Rd. Note (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordinates for Ref. No.'s 929-1127 are not available. page 33 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 -OREGON CITY SOUTH FORK WATER BOARD PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER - CLACKAMAS

· · . ..· . . . .· · ... . · ...... • ' - . . . .• Reference ' . · ...... "" • . . . .. • • 11) ·. .• • ... .. • . . • .. • • • Ill X- · ·• · No.{see I Cont . . . . ·.· . otenti 011nant o r ..· ce . . .. . UTM �.TM Y', 'P u . / . ..·· .. .. • S · · . ? � . . · , , • •. ·•· •·· · . · ·• ...... , ·.. . Jatile3f Coordln.ate Coordinate ·Name .. J\pproxl!)iatel;QPalJon located on the east side of Eagle Creek Rd., soulh of Ely Rd., north of 902 551522.3618 5018104.8 Sunrise Markel Duus Rd. located on the west side of Eagle Creek Rd., near Duus Rd. 903 551449.4684 5017916.611 tack shop intersection located on the south side, at the west end, of Duus Rd., off Eagle 904 551750.8702 5017890.169 Christmas trees Creek Rd. located on the soulh side, at the west end, of Ouus Rd., at Currin Ck. 905 551964.8529 5017911.047 farm Crossing

located on the north side of Duus 906 552139.704 5018045,045 Christmas trees Rd., east of Currin Creek crossing

located on the south side of Duus 907 552415.7579 5017910.521 McClain Farm - livestock Rd., at Intersection of Barger Blvd. located on the south side of Ouus Rd., between Eagle Creek & Currin 908 5531 17.4168 5017187.862 Valley View (Estacada) Airport Rd.

located on the north side of Duus 909 553995.9469 5017708.31 rural residential area Rd., wesl of Shoregorick Rd.

located on the south side of Duus 910 553857.4741 5017561.096 Christmas trees Rd., west of Shoregorick Rd.

located on the north side of Duus 911 554154.1993 5017677.488 Mountain View Mobile Court Rd., across from Shoregorick Rd. located on the west side of Shoregorick Rd., at Duus Rd. 912 554173.5311 5017543.945 nursery Intersection

located on the west side of Eagle 913 551541.2007 5017678.587 Estacada Christian Church Creek Rd., soulh of Duun Rd.

located on the west side of Eagle 914 551571.6984 5017578.616 Clackamas Valley Baptist Church Creek Rd., south of Duus Rd. located on the east side of Eagle 915 551634.6803 5017612.553 Peace Lutheran Church Creek Rd., south of Duus Rd. located on the east side of Eagle Creek Rd., north of River Mill & 916 551818.5866 5017142.007 Christmas trees Hinman Rd.

located on the west side of Eagle 917 551631.1367 5017429.535 Estacada Body & Paint Creek Rd., north of River Mill Rd.

located on the west side of Eagle 918 551756.8382 5017057.807 Clackamas Towing Creek Rd., north of River Mill Rd.

Notes: (1)Universal Transverse Mercator (UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X- and Y-coordlnates for Ref. No.'s 929-1 127 are not available. page 34 of 35 TABLE 4. SPATIAL COORDINATES OF POTENTIAL CONTAMINANT SOURCES

PWS # 4100591 - OREGON CITY SOUTH FORK WATER BOARD

PWS # 4100580 - NORTH CLACKAMAS COUNTY WATER COMMISSION, and PWS # 410( CLACKAMAS RIVER WATER · CLACKAMAS

. · . · · .. .. .· . _-- . · · R�Jel'enc� >' - -- , ,-_.- < .: ' .. - · · . .. • .. · • ; .•> o; Nii. (see . ·. UTM111X- \ffM111Y, Poientlal C(!ntari)l!1antSotli ce. .. ·•/ : . . · _ '_- •• / • •. • . • ··· '';. '•' · .. . . >'Ta�Je3) -- Cpordlnate .·Coordinate ·Name. . AllProxlmateto.catlon··· 30424 Eagle Creek Rd., near River Mill Rd. Intersection, on the east 919 551849.914 5017014.929 Jehovah's Witness Kingdom Hall side of Rd. 30498 Eagle Creek Rd., located near Intersection of River Mill & 920 551718.3868 5016969.443 Church of Latter Day Saints Eagle Creek Rd. located on the east side of Tracy 921 556141.8236 5015897.956 farm machinery Rd. at Linde Ln. located on the east sfde of Tracy 922 555994.4743 5016498.576 dump trucks Rd. at Rhodes Rd. located at the northeast corner at the Intersection of Snuffln & Davis 923 555618.1018 5017440.018 livestock - cattle Rd. located at the Intersection of Snuffin 924 556716.4766 5017113.013 Eagle Fern Camp & Camp Rd.

located on the east side of George 925 558068.3651 5016909.922 clearcut area Rd., south of Jannsen Rd.

located on the east side of George 926 558855.3643 5016238.351 livestock - horses Rd., northwest of Clausen Rd. town of George - located on the east side of George Rd., south of 927 559229.7558 5015998.923 Christmas trees Clausen Rd. town of George - located on the soulh side of George Rd., south of 928 560083.1736 5015677.224 George Fire Station I Substation Clausen Rd.

Notes: (1)Unlversal Transverse Mercator {UTM) Zone 10, NAD27, projection X- and Y- coordinates are provided and correlate to Figure 4. X-and Y-coordinates for Ref. No.'s 929-1127 are not available. page 35 of 35

Attachment A

Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water PWS # 4100591, 4100580, and 4100187

Attachment A. Source Water Assessment Summary Brochure I I I I I I I I I I I I I I I I I I I I I I I I I I SOURCE WATER ASSESSMENT SUMMARY BROCHURE

OREGON CITY - SOUTII FORK WATER BOARD, PWS #4100591 NORTH CLACKAMAS COUNTY WATER COMMISSION, PWS #4100580 AND CLACKAMAS RIVER WATER, PWS #4100187

WHAT IS A SOURCE WATER ASSESSMENT? NCCWC, and CRW's intakes (SFWB, NCCWC, The Source Water Assessment was recently and CRW's portion of the drinking water completed by the Department of Environmental protection area) between the OC-SFWB intake Quality (DEQ) and the Oregon Department of and the upstream intake for Estacada. The Human Services (DHS) to identify the surface boundaries of the Drinking Water Protection Area areas (and/or subsurface areas) that supply water are illustrated on the figure attached to this to Oregon City - South Fork Water Board (OC summmy. Information on the protection area SFWB), North Clackamas County Water upsh'eam of the Estacada intake is summarized in Commission (NCCWC), and Clackamas River SFWB, NCCWC, and CRW's assessment. Water's (CRW) public water system intakes and to iuventory the potential contaminant sources that Activities and impacts in the SFWB, NCCWC, may impact the drinking water supplies. and CRW protection area have the potential to also impact the downstream water users (Lake WHY WAS IT COMPLETED? Oswego Municipal Water will be provided a copy The Source Water Assessment was completed to of this assessment). provide informat ion so that the OC-SFWB, The OC-SFWB, NCCWC, and CRW intakes are NCCWC, and CRW public water system located in the Lower Clackamas River Watershed staff/operator, consumers, and community citizens in the Clackamas Sub-Basin of the Willamette can begin developing sh'ategies to protect the Basin. The geographic area providing water to the source of their drink ing water, and to minimize intakes (the drinking water protection area) future public expenditures for drink ing water extends upstream from the OC-SFWB intake treatment. The assessment was prepared under approximately 335 miles (approximately 1,130 the requirements and guidelines of the Federal miles including area upstream of the Estacada Safe Drinking Water Act (SDW A). intake) in a southeasterly direction and encompasses a total area of 264 square miles WHAT AREAS ARE INCLUDED IN OC-SFWB, (939 total square miles including the area NCCWC, AND CRW'S DRINKING WATER upstream of the Estacada intake). Included in this PROTECTION AREA? area are a number of tributaries to the Clackamas The drink ing water for OC-SFWB, NCCWC, and River including Rock, Richardson, Clear, Eagle, CRW is supplied by three individual intakes on Deep, Foster, and Goose Creeks and their the Clackamas River. These three public water tributaries. suppliers teamed with DEQ and DHS to complete this Source Water Assessment for the Clackamas The protection area within an 8 -hour tt·avel time River watershed upstream of the intakes. from the intake extends approximately 14.3 miles Combined, the three public water systems serve upstt·eam of the OC-SFWB intake. It is approximately 90,000 citizens. recommended that the water systems and community consider increased protection within In addition to the intakes for OC-SFWB, an 8-hour travel time from the intake since eight NCCWC, and CRW, there are intakes for three hours should provide adequate response time to other water providers in the Clackamas River protect the integrity of the public water system watershed; a schematic diagram of the Clackamas intake should a spill or release occur at any Sub-basin Drink ing Water Protection Areas is crossing or discharge point to the stream. attached. This assessment addresses the geographic area providing water to OC-SFWB, WHAT ARE THE POTENTIAL SOURCES OF WHAT ARE THE RISKS FOR OUR SYSTEM? CONTAMINATION TO OC-SFWB, NCCWC, AND A total of 1,127 potential contaminant sources CRW'S PUBLIC DRINKING WATER SUPPLY? were identified in OC-SFWB, NCCWC, and The primary intent of this inventory was to CRW's drinking water protection area. An identify and locate significant potential sources of additional 51 potential sources of contamination contaminants of concern. The delineated drinking were identified upstream of the Estacada intake. water protection area is occupied by Of the sources identified in the OC-SFWB, residential/municipal, agricultural/forest, and NCCWC, and CRW's portion of the protection commercial/industrial land uses. area, 533 are located in the sensitive areas and 445 + Potential contaminant sources identified in the are high- to moderate-risk sources within watershed that relate to agricultural/forest "sensitive areas". There are an additional 199 sites management include itTigated and non-ilTigated where the location and sensitivity was not crop areas, managed forest lands, animal grazing identified during the inventory. The sensitive areas, boarding stables, confined animal feeding areas within the OC-SFWB, NCCWC, and CRW operations, farm machinery repair shops, and drinking water protection area include areas with chemical mixing/storage/handling areas. high soil permeability, high soil erosion potential, + Potential contaminant sources related to high runoff potential and areas within l 000 feet commercial and industrial land uses include from the river/sh·eams. The sensitive areas are parking lots/malls, fleet/trucking terminals, gas those where the potential contamination sources, stations, bo dy/repair shops, chemical if present, have a g realer potential to impact the processing/storage facilities, food processing water supply. The information in this assessment facilities, junk/scrap/salvage yards, machine provides a basis for prioritizing areas in and shops, metal plating/finishing/fabrication shops, around our community that are most vulnerable to wood/pulp/paper processing facilities, and other potential impacts and can be used by the OC manufacturingland uses. SFWB, NCCWC, and CRW community to + The potential contaminant sources identified in develop a voluntary Drinking Water Protection the watershed that relate to residential/ Plan or incorporate drinking water protection municipalities include high density housing areas, sh·a tegies into your existing watershed work. a landfill, rural homesteads with septic systems, campgrounds, parks, golf courses, waste NEED MORE INFORMATION? transfer/recycling stations, utility stations, and OC-SFWB, NCCWC, and CRW's Source Water wastewater h·eatment plants. Assessment Report provides additional details on + In addition, several major transportation the methodology and results of this assessment. corridors and bridges, storm water retention The fullreport is available for review at: basins/outfalls, channel alteration areas, transmission line right-of-ways, and substations were located with the drinking water protection area. This provides a quick look at the existing potential Contact your public water system staff if you sources of contamination that could, if improperly would like additional information on OC -SFWB, managed or released, impact the water quality in NCCWC, and CRW's Source Water Assessment the watershed. results. Clackamas Subbasin Drinking Water Protection Areas

Jt+f Drinking Water Protection Area • Drinking Water Intake - Surface Water

Watersheds are delineated intake-to-intake: . For watersheds with more than one intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next intake upstream. All protection areas upstream of the water system's intake are included in the drinking water protection area (DWPA). We encourage water systems located in the same basin to work together during protection planning.

Kiiometer•

� �

l!IE 0~ 10 -·- IVD.1 =:°"'llr Prlnted1'?owmber, 2002 Oregon Department of Environmental Quatlty GIS OC-SFWB, NCCWC and CRW portion of the Clackamas Sub-Basin Drinking Water Protection Area

PWS 4100591/PWS 4100560/PWS 4100187

Drinking Water "' Protection Area • Drinking Water Intake - Surface Water Forwatersheds with more than one Intake, Oregon completes the assessments by segment end each - source water assessment represents the area from the public water system's Intake tothe next Intake upstream. This assessment addresses the geographic area providing wsterto OC-SFWB, NCCWC, and CRW's intakes (SFWB, NCCWC, and CRW's portion of the drinking water protection areal between the OC-SFWB Intake and the upstream Intake for Estacada. All protection areas upstream of each water system's Intake ere included In the drinking water protection area. Activities and Impacts In this drinking water protection area also have the potential to Impact downstream water users.

Note on Base Map: 1:100,000 scale U.S. Gaologlcal Survey Digital Raster Graphics (DAGsl for Oregon Citv (1982) and Mount Hood 11983) are displayed. DRGs are scanned Images of topographic sheets. Where the OAGs join, seams and/or gaps may be visible. Between DRGs, variations In Information displayed also may be seen.

-1 I Jiii "

i I

·-· il: llE!1 .',�ji':-:,;,• --- -· = PrlntedNowmbor, 2002 ,_ 0111gon O..penmom of Envlronmctr>t.ol o,,..uw OtS Attachment B

Source Water Assessment Report Oregon City - South Fork Water Board, North Clackamas County Water Commission, and Clackamas River Water PWS # 4100591, 4100580, and 4100187

Attachment B. Summary of Source Water Assessment Results for Upstream Intake(s)

City of Estacada (PWS # 4100279) Executive Summaiy Figures Tables

USFS Timberlake JCC (PWS #4101093) Executive Summary Figures Tables

Attachment B. Summary of Source Water Assessment Results fo r Upstream Intakes

City of Estacada (PWS #4100279)

Executive Summary

Figure 1. City of Estacada Drinking Water Protection Area Figure 2. Sensitive Areas within City of Estacada's Drinking Water Protection Area Figure 3. Source Water Assessment Results - City of Estacada's Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources

Table 1. Summary of Potential Contaminant Sources by Land Use Table 2. Invento1y Results- List of Potential Contaminant Sources Table 3. Results of Regulatmy Database Search

Executive Summary The drink ing water forCity of Estacada is supplied by an intake on the Clackamas River. This public water system serves approximately 1,910 citizens. The intake is located in the Lower Clackamas and Middle Clackamas River Watershed in the Clackamas Sub-Basin of the Willamette Basin. The US Forest Serv ice (USFS) Ripplebrook Ranger Station/Timberlake Job Corps Center intake for their public water sy stem is also located on the Clackamas River upstream of the Estacada intake. This source water assessment addresses the geographic area providing water to Estacada's intake (the drinking water protection area) between Estacada' s intake and the upstream intake forthe USFS . Information on the protection area upstream of the USFS intake is presented in the Source .Water Assessment forthat public water system and is summarized in this re port. In addition, there are several drink ing water intakes on the Clackamas River downstream of Estacada's intake including intakes for the Clackamas Riv er Water, Oak Lodge Water District (North Clackamas County Water Commission), Oregon City (South Fork Water Board), and City of Lake Oswego (Lake Oswego Municipal Water). Activities and im pacts in the Estacada drinking water protection area have the potential to also impact downstream users.

The geographic area providing water to Estacada's intake (the drink ing water protection area) extends upstream approximately 58 miles along the Clackamas River and encompasses a total area of 532 square miles. Included in this area are a number of tributaries to the main stem, including Linglebeck Creek, the North Fork and South Fork of the Clackamas River, Memaloose Creek, Fish Creek, Big Creek, Cripple Creek, the Collawash River, and the Roaring River. The elevation change from the upper edge of the watershed to the intake is approximately 6,800 feet. Estacada' s intake is located at an approximate elevation of 400 feet as Clackamas River flows into the valley floorfrom the mountains.

An inventory of potential contamination sources was performed within Estacada's segment of . the drink ing water protection area. Because of the large size of the dr inking water protection area and DEQ's limited resources, the inventory was limited lo the lower portion of the watershed. The Upper Clackamas sub-basin (upstrealn of the mouth ofthe Col/awash river) and the Col/awash river sub-basins were not surveyed fo r potential contaminant sources. It is highly recommended that the public water system and/or community "enhance" the inventory by identifying potential contamination sources in these areas through further research and local input.

The primary intent of this inventory was to identifyand locate significant potential sources of contaminants of concern. The inventory was conducted by reviewing applicable state and federal regulatory databases and land use maps, interv iewing persons knowledgeable of the area, and conducting a windshield survey by driving through the drinking water protection area to field locate and verifyas many of the potential contam inant source activities as possib le. The primary contaminants of concern forsurface water intakes are sediments/turbidity, microbiological, and nutrients. It is important to re member that the sites and areas ident ified are only po tential sources of contam ination to the drinking water, and water quality impacts are not likely to occur when contaminants are used and managed properly.

The delineated drinking water protection area is primarily dom inated by agricultural, re sidential and rural land uses between Estacada's intake and the North Fork Reservoir and is primarily dom inated by managed forest landsabove the North Fork Reservoir. A total of 34 potential

Oregon Source Water Assessment Report 1 City of Estacada -PWS # 4100279 contamination sources were identif ied within Estacada's drink ing water protection area. Of those, 30 are located in the sensitive areas. The potential contam inant sources identified in the watershed include several residential developments; high-use re creational areas; a furniture re pair shop; grazing areas; managed forests; timber management operations and work centers with associated equipment maintenance facilities, machine shops, and waste water treatment facilities; the hydroelectric plant/dam;and transm ission line and transportation corridors. This provides a quick look at the existing potential sources of contamination that could, if im properly managed or re leased, impact the water quality in the watershed.

The susceptibility analys is combines the results of the locations of the potential contam inant sources with the locations of the sensitive areas. Overlaying the locations of the moderate- to high-risk sources with in the sensitive areas provides an indication of the areas that are highly susceptible to contamination. In the Estacada watershed, the results of the susceptibility "analysis" include the distribution of 30 identified high- to moderate-risk sources within the areas of highly permeable soils, high erosional soils, high runoff potential so ils, and within the 1000' setback from the streams. The susceptibility analysis provides the commun ity and the public water system with informationon where the greatest risk occurs and where to focus resources for protection.

2 Oregon Source Water Assessment Report City of Estacada - PWS # 4 l 00279 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100279 ESTACADA, CITY OF Residential/Municipal Land Uses Relative Total in Potential Contamination Source Notes Risk Level DWPA Airport - Maintenance/Fueling Area Higher 0 Apartments and Condominiums Lower 1 Campgrounds/RV Parks (1) Moderate 8 Cemeteries - Pre-1945 Moderate 0 Drinking Water Treatment Plants Moderate 2 Fire Station Lower 0 Fire Training Facilities Moderate 0 Golf Courses Moderate 0 Housing - High Density (> 1 House/0.5 acres) Moderate 4 Landfill/Dumps (1) Higher 0 Lawn Care - Highly Maintained Areas Moderate 0 Motor Pools Moderate 1 Parks Moderate 1 Railroad Yards/Maintenance/Fueling Areas Higher 0 Schools Moderate 1 Septic Systems - High Density ( > 1 system/acre) (1) Higher 0 Sewer Lines - Close Proximity to PWS (1) Moderate 1 Utility Stations - Maintenance Transformer Storage Higher 2 Waste Transfer/Recycling Stations (1) Moderate 0 Wastewater Treatment Plants/Collection Stations (1) Higher 4 Other: future residential land use Moderate 1

(2) • Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation

(3) • For groundwater public water systems, septic systems located within the 2·year Ume-Of·travel (TOD are considered moderate risks.

1/30/01 Page 1 of 4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100279 ESTACADA, CITY OF Commercial/Industrial Land Uses Relative Total in Potential Contamination Source Notes Risk Level DWPA Automobiles - Body Shops Higher 0 Automobiles - Car Washes Moderate 0 Automobiles - Gas Stations Higher 0 Automobiles - Repair Shops Higher 0 Boat Services/Repair/Refinishing Higher 0 CemenUConcrete Plants Moderate 0 Chemical/Petroleum Processing/Storage Higher 0 Dry Cleaners Higher 0 Electrical/Electronic Manufacturing Higher 0 FleeUTrucking/Bus Terminals Moderate 1 Food Processing Moderate 0 Furniture/lumber/Parts Stores Moderate 1 Home Manufacturing Higher 0 Junk/Scrap/Salvage Yards Higher 3 Machine Shops Higher 2 MedicalNet Offices (1) Moderate 0 Metal Plating/Finishing/Fabrication Higher 0 Mines/Gravel Pits Higher 0 Office Buildings/Complexes Lower 1 Parking Lots/Malls (> 50 Spaces) Higher 0 Photo Processing/Printing Higher 0 Plastics/Synthetics Producer Higher 0 Research Laboratories Higher 0 RV/Mini Storage Lower 0 Wood Preserving/Treating Higher 0

Wood/Pulp/Paper Processing and Mms Higher 1 Other 0

NOTES: • Sites and areas identified in this Table are only potential sources of contamination to the drinking water. Environmental contamination is not likely to occur when contaminants are used and managed properly. (1)- Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - For groundwater public water systems, septic systems located within the 2-year time-of-travel (TOn are considered moderate risks.

1130/01 Page 2 of4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100279 ESTACADA, CITY OF Agricultural/Forest Land Uses Relative Total in Potential Contamination Source Notes Risk Level DWPA Auction Lots (1) Higher 0 Boarding Stables (1) Moderate 0 Confined Animal Feeding Operations (CAFOs) (1) Higher 0 Crops - Irrigated (inc. orchards, vineyards, nurseries, greenhouses) (2) Moderate 0 Crops - Nonirrigated (inc. Christmas trees, grains, grass seed, pasture) Lower 0 Farm MachineryRepair Higher 0 Grazing Animals (> 5 large animals or equivalent/acre) (1) Higher 1 Lagoons/liquid Wastes (1) Higher 0 Land Application Sites (1) Moderate 0 Managed Forest Land - Broadcast Fertilized Areas Lower 0

Managed Forest Land - Clearcut Harvest (< 35 yrs.) Higher 4 Managed Forest Land - PartialHarvest (< 10 yrs.) Higher 1 Managed Forest Land - Road Density ( > 2 mi./sq. mi.) Moderate 0

Pesticide/Fertilizer/Petroleum Storage, Handling, Mixing, & Cleaning Ar Higher 2 Recent Burn Areas (< 10 yrs.) Lower 0 Managed Forest Lands - Status Unknown Moderate 0 Other 0

NOTES: Sites and areas identified in this Table are only potential sources of contamination to the drinkfng water. Environmental contamination is not likely to occur when contaminants are used and managed properly.

(1) - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation

(3} - For groundwater public water systems, septic systems located within the 2-year time-of-travel (TOn are considered moderate risks.

1130101 Page 3 of 4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE

PWS # 4100279 ESTACADA, CITY OF Miscellaneous Land Uses Relative Total in Potential Contamination Source Notes Risk Level DWPA Above Ground Storage Tanks - Excluding Water Moderate 3 Channel Alterations - Heavy Lower 0 Combined Sewer Outfalls (1) Lower 0 Stormwater Outfalls (1) Lower 0 Composting Facilities (1) Moderate 0 Historic Gas Stations Higher 0 Historic Waste Dumps/Landfills (1) Higher 0 Homesteads - Rural - Machine Shops/Equipment Maintenance Higher 0 Homesteads - Rural - Septic Systems (< 1/acre) (1)(3) Lower 0 Injection/DryWells, Sumps - Class V UICs (1) Higher 0 Kennels {> 20 Pens) (1) Lower 0 Military Installations Higher 0 Random Dump Sites Higher 2 River Recreation - Heavy Use (inc. campgrounds) (1) Moderate 5 Sludge Disposal Areas (1) Moderate 0 Stormwater Retention Basins (1) Moderate 0 Transmission Lines - Right-of-Ways Higher 2 Transportation - Freeways/State Highways/Other Heavy Use Roads Higher 1 Transportation - Railroads Moderate 0 Transportation - Right-Of-Ways - Herbicide Use Areas Moderate 0 Transportation - River Traffic - Heavy Lower 0 Transportation - Stream Crossing - Perennial Lower 0 UST - Confirmed Leaking Tanks - DEQ List Higher 0 UST - Decommissioned/Inactive Lower 0 UST - Nonregulated Tanks (< 1,10 0 gals or Large Heating Oil Tanks) Higher 0 UST - Not Upgraded and/or Registered Tanks Higher 0 UST - Upgraded/Registered - Active Lower 0 UST - Status Unknown Higher 0 Upstream Reservoirs/Dams Moderate 1 Wells/Abandoned Wells Higher 0 Large Capacity Septic Systems (serves > 20 people) - Class V UICs (1) Higher 0 Construction/Demolition Areas Moderate 0 Other: Heliport serving Mt. Hood NF sites Moderate 1 Other: Power Boal/watercraft fueling area on pier over water Higher 1

NOTES: Sites and areas identified in this Table are only potential sources of contamination to the drinking water. Environmental contamination is not likely to occur when contaminants are used and managed properly. (1) - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - For groundwater public water systems, septic systems located within the 2-year time-of-travel (TOn are considered moderate risks.

1130/01 Page 4 of 4 TABLE INVENTORY RESULTS - LIST OF POTENTIAi:. CONTAMINANT SOURCES 2.

PWS# 4100279 ESTACADA, CITY OF

Reference Potential Proximity to Relative No. {See Contaminant Approximate Method for Sensitive Risk Figure) Source Type Name Location City Listing Areas Level {2) Potential Impacts Comments Furniture/Lumber/Parts Rocky's Furnitiure Cadonau Rd,-0.7km Estacada Database Within sensitive Moderate Spills, leaks, or Improper handling of hazardous Stores Stripping & Repair southeast of Hwy. 211 (2) Field- area. chemical products and other materials in Apparently a small business Observation inventory during transportation, use, storage and operating out of a private disposal may impact the drinking water supply. residence.

2 Transmission Lines - Right- PGE High Tension Along river corridor Estacada Field- Within sensitive Higher Construction and corridor maintenance may of-Ways Power Lines between Hwy 224 and the Observation area. contribute to increased erosion and turbidity in Telephone and cable !Jnes also mainstem drinking water supply. Over-appllcatlon or present. Improper handling of pesticides or fertilizers may impact drinking water supply. -- 3 Transmission Lines - Right- PGE Cazadero Between Hwy. 224 and Estacada Field- Within sensitive Higher Construction and corridor maintenance may of-Ways Hydroelectric Faraday Lake Observation area. contribute to increased erosion and turbidity ln Plant/Dam Interview drinking water supp!y. Over-applicat!on or improper handling ofpesticides or fertilizers may impact drinking water supply. Upstream Moderate During major storm events, reservoirs may Reservoirs/Dams contribute to prolonged turb!dlty for downstream intakes for drinkin9 water. Construction, · fluctuatingwater levels, and hea"Y waterside use can increase erosion and turbid"ity in reservoir/drinking water source. Utility Stations - Higher Spills, leaks. or improper handling of chemicals Maintenance Transformer and other materials including PCBs during Storage transportati0t1, use. storage and disposal may impact the drinking water supply.

4 Housing -High Density (> Estacada Mobile North side of Hwy. 224, Estacada Database Within sensitive Moderate Improper use. storage, and disposal of household 1 House/0.5 acres) ViUage west of Faraday Rd. (2) Field- area. chemicals may impact the drinking waier supply. Observation Stormwater run-off or infiltration may carry contaminants to drinking water supply.

5 Managed Forest Land - Managed forest - Slopes above Faraday Estacada Field- Within sensitive Higher Cutting and yarding of trees may contribute to Clearcut Harvest (< 35 unknO

Note; Sltos and araas ldentltlad ITTthis Table ateonly potontlal SOUfC(ffiof contamlNltlon to thtt drinking w:itor. Environmental cont:1mlriatlon ls not llkttly tooccur when contaminant,; are used ;J(ld mana1;1ed property.

(1) Where multiple potential contaminant sources e>clsl at a site. the highest love! of risk is used. (2:)See T::ihlc 3 lor database ll:;tinps (If necess::iry).

t/30/01 PillJe 1 of e TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES

PWS# 4100279 ESTACADA. CITY OF

Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Figure) Risk Source Type Name Location City Listing Areas Level (2) Potential Impacts Comm£>nts

6 Junk/Scrap/Salvage Yards Oregon limber Faraday Rd., near east Estacada Field� Within sensitive Higher Spills, leaks. or improper handling of automotive Resources end of Faraday Lake Observation area. chemicals, batteries. and other waste materials Small scale timber mgmt. during storage and disposal may impact the operation with significant heavy drinking water supply. equipment storage and apparent salvage occuring on open ground.

Wood/Pulp/Paper Higher SpiUs, leaks, or improper handling of wood Processing and Mills preservatives and other chemicals during Small scale timber mgmt. transportation, use, storage and disposal may operation with significant heavy impact the drinking water supply. equipment storage and apparent salvage occuring on open ground.

7 Grazing Animals (> 5 large Chrysler Lane Surface Rd. @ Chrysler Estacada Field· Within sensitive Higher Improper storage and management of animal animals or Spiderweb Ranch Ln. (top of hi!!) Observation area. wastes may impact drinking water supply. Wood lot clearing/thinning for equivalent/acre) Concentrated livestock may contribute to erosion hog pasture. and sedimentation of surface water bodies.

Managed Forest Land • Higher Cutting and yarding of trees may contribute to Clearcut Harvest (< 35 increased erosion, resulting in turbidity and y

8 Random Dump Sites Private land - Bend in Moss Hill Rd., Estacada Field- Within sensitive Higher Illegal trash and debris containing chemicals and unknown ownership south of Linglebeck Creek ObseNation area. hazardous materials may cause contamination to Large appliances and other groundwater or surface water supply. miscellaneous refuse.

9 Random Dump Sites Private land - Moss Hill Rd. at Estacada Field- . Within sensitive Higher JHegal trash and debris containing chemicals and unknown ownership Unglebeck Creek Observation area. hazardous materials may cause contamination to Abandoned automobiles groundwater or surface water supply. interspersed throughout woodlot.

Managed Forest Land - Higher Cutting and yarding of trees may contribute to Partial Harvest (< 10 yrs.) increased erosion, resulting in turbidity and Abandoned automobiles chemical changes (ex: nitrates) in drinking water interspersed throughout woodlot. supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water source.

Note: Siles and 3J'eas ldontlf!ad Inthis Table are only potentlal sources of cont:imln:itlon to the drinking w.iter. Envlronmm1t:1l contamination � not meaty tooccur when contaminants 3J'e w;ed and m:,ma(led property.

~~(1) Whllfe multiple potential conbmloant sourCf.ls exist ata site. tho hlgh(l:;t !1Wel of risk 1$ w;ed. (2) See T:ible 3 for database llstln(ls {If nccess:uy).~~

~~1130/01 Page 2of8 TABLE 2. INVENTORY RESULTS -LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA, CITY OF~~

~~Reference Potential Proximity to Rel.i!.tive No. (See Contaminant Approximate Method for Sensitive Risk Figure) Source Type Name Location City Listing Areas Level (2) Potentfal Impacts Comments~~

10 Other future residential Residential Darrow Rd. & Mountain Estacada Field- Within sensitive Moderate The impacts to this potential contaminant source Active construction & rand land usa development!constructi View Ln. Observation area. will be addressed during the enhanced inventoiy preparation at time of SUNey. on Erosion control structures in place. Risk level assumes extenslon/connect!on of city water, wastewater, and storm sewer lines.

11 Junk/Scrap/Salvage Yards Private land - End of Trail Rd. Estacada Fie!d- Within sensitive Higher Spills, teaks, or improper handling of automotive unknown ownership Observation area. chemicals, batteries, and other waste materials Scrap autos and parts stored on during storage and disposal may impact the open ground. drinking water supply.

12 River Recreation - Heavy North Fork Reservoir East side of Faraday Rd. Estacada Field- Within sensllive Moderate Inadequate disposal of human wastes may Use (inc. campgrounds) Boat Launch - PGE Observation a

13 River Recreation - Heavy Promontory Park - Between North Fork Estacada Database Within sensitive Moderate Inadequate disposal of hum.in wastes may Use (inc. campgrounds) PGE Reservoir and Hwy. 224 (2) Field- area. contribute bacteria and nutrients to the drinking Marina and park for use by PGE Observation water supply. Heavy use may contribute to employees and guests. Interview · streambank erosion causing turbidity. Fuel spills and emissions may a!so contribute to contamination. Other Power Higher The impacts of this potential contaminant source BoaUwatercraft fueling will beaddressed during the enhanced Inventory. Marina and park for use by PGE area on pier over water employees and guests.

Parl<• Moderate Over-application or Improper handling of pesticides/fertilizers may Impact drinking water, Marina and pali for use by PGE Excessive irrigation may cause transport of employees and gues�. contaminants through runoff. Heavy use along edge of waterbody may contribute to erosion, causing turbidity. Wastewater Treatment Higher Improper �nagement of wastewater, treatment Plants/Collection Stations chemicals, or equipment maintenance materials Marina and park for use by PGE may impact drinking water supply. employees and guests.

Not(}: Sites andareas ldenuned In this Table are only polOn!lal SOllfc� of conumlnatlon to tho dnnkl"'IJ waier. Envlronmantal conl::lmlnatlon ls notllkely to occur wnen contaminants are used anti managOO property.

~~(1) Whoro multiple p0rontlal comamln<"!nt S.OUfcos e�l�t at a i.lte, tht:1 hlghlof risk Is usoo. (2) Seo Table 3 for aaiabas.e llstinas {lf l'IOCl;ISS:lfY),~~

~~1130101 PagoJofS~~

~~"· -- ,..,_ TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA. CITY OF~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Figure) Source Type Name Location 'City Listing Areas Level (2) Potential Impacts Comments~~

14 Housing - High Density (> Silver Fox RV Park Hwy 224, across from Estacada Database Outside Moderate Improper use, storage, and disposal of household 1 House/0.5 acres) Promontory Park (2) Field· sensitive areas. chemicals may impact the drinking water supply. Observation Stormwater run-off or lnfi!tratlon may carry Interview contaminants to drinking water supply. Wastewater Treatment Higher Improper management of wastewater, treatment Plants/Col!ection Stations chemlcats, or equipment maintenance materials may impact drinking water supply.

15 Managed Forest Land - Managed forest Ridges on SW side of Estacada Field- Outside Higher Cutting and yarding of trees may contribute to Clearcut Harvest (< 35 lands - unknown mainstem between Observation sensitive areas. increased erosion. resulting in turbidity and Viewed from Hwy. 224 during y

16 Transportation - Highways 211 -and 224 Hwys. intersect just below Estacada Field- Within sensitive Higher Vehicle use increases the risk for leaks or spms of Freeways/State intake, 224 runs parallel Observation area. fuel & other haz. materials. Road bu�ding, Highways/Other Heavy to the mainstem maintenance & use can increase erosion/slope Use Roads failure causing turbidity. Over-application ot improper handling of pesticides/fertilizers may impact water.

17 Drinking Water Treatment City of Estacada, North side of malnstem. Estacada Database Within sensitive Moderate Treatment chemicals and equipment Plants Drinking Water just upstream of Hwy. 211 (2) Field- area. maintenance materials may impact.groundwater Treatment Works bridge Observation or surface water source.

18 Utility Stations - Utility Station - Day Hill Rd. @Valley Estacada Database Outside Higher SplUs. leaks, or improper handling of chemicals Maintenance Transformer Gascade Utilities & View Dr. (2) Field- sensitive areas. and other materials including PCBs during Storage Airtouch Cellular Observation transportation, use, storage and disposal may impact the drinking water supply.

19 Maehine Shops Estacada Work Estacada River Lake Rd., Estacada Field- Within sensitive Higher Spins, leaks. or improper handling of solvents. Center, Mt. Hood NF just north of Hwy. 211 Observation area. metals. and other chemicals or materials during USFS field operations center. transportation. use. storage and disposal may impact the drinking water supply. FteeUTiucidng/Bus Moderate Spills, leaks. or improper handling of fuels, Terminals grease, solvents. and other materials from vehicle USFS field operations center. service, fueling. and parking areas may impact

~~the drinking water supply. ,~~

Note: $Ito$ and aroas ldoodflC!d In this.Table am ori1ypotential source� ef contamlnatlori to thedrlnldriog W3tor. en�ltonmontal contamlrnillon i� not Ukely lo occur wllen contamlrnmti> :JllJ U$ed and managod ptopW'ly.

~~(1) Where lmllllp!e potent!;)! contaminant sources exist at a $lie, the hli;ihest level of ril;k Isus11d. (2) Soti Table 3 for d;JtaDas.a Ustlng� (If n11C1;1�sary).~~

~~1130/01 Page 4of8 TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA. CITY OF~~

Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Agure) Source Type Name Location City Listing Areas Level (2) Potential Impacts Comments 20 Managed Forest Land - Managed forest Northwest side of Estacada Field- Outside Higher Cutting and yarding of trees may contribute to Clearcut Harvest (< 35 lands - BLM &lor USFS Hl!lockbum Rd. between Observation sensitive areas. increased erosion, resulting in turbidity and Active logging at time of survey yrs.) the 120 and 130 spurs chemical changes !n drinking water supply. Over- apptfcatlon or Improper handling of pesticides or fertilizers may impact drinking water source.

21 River Recreation • Heavy Unofficial campground Junction of the North Fork Estacada Field- Within sensitive Moderate Inadequate disposal of human wastes may Use {inc. campgrounds) Clackamas and Hwy. 224 Observation area. contribute bacteria and nutrients to the drinking Dispersed boating, fishing, and interview water supply. Heavy use may contribute to swimming. Mostly day·use with stteambank erosion causing turbidJty. Fuel spms occasional camping. and emissions may also contribute to contamination.

22 River Recreation - Heavy Unofficial campground Southeast bank of the Estacada Field· Within sensitive Moderate Inadequate disposal of human wastes may Use (inc. campgrounds) on the mainstem upper North Fork Observation area. conttlbute bacteria and nutrients to the drinking Access via boat only, Reported Clackamas Reservoir & adjacent Interview water supply. Heavy use may conttlbute to heavy summer-time use. island streambank erosion causing turbidity. Fuet spiUs and emissions may also contribute to contamination.

23 Campgrounds/RV Parks LazyBend South side of Hwy. 224 Estacada Database Within se'.lsitive Moderate Leaks or spllls of automotive fluids or improperly Campground - USFS_ just east of Memaloose (2) Field· ., ... managed septic systems and wastewater Bridge Observation disposal may impact drinking water supply. Interview Heavy usage along edge of waterbody may contribute to erosion, causing turbidity.

24 River Recreation - Heavy Big Eddy Day Use At. prominent mainstem Estacada Field- Within sensitive Moderate Inadequate disposal of human wastes may Use (inc. campgrounds) Area · USFS river bend upstream of Observation area. contribute bacteria and nutrients to the drinking large exposed rock cliff Interview water supply. Heavy use may contribute to streambank erosion causing turbidity. Fuel spills and emissions may also contribute to contamination.

25 Campgrounds/RV Parks Cluster of several At junction of Fish Creek Estacada Field· Within sensitive Moderate Leaks or spills of automotive fluids or improperly campgrounds • USFS and the mainstem Observation area. managed septic systems and wastewater Carter Bridge, Lockaby, Clackamas lnteri1iew disposal may Impact drinking water supply. Armstrong, and Fish Creek Heavy usage along edge of waterbody may campgrounds contribute to erosion, causing turbidity.

Nora: S�es and :iro11.& identified Intl'lls Table are only POtemlat l>Ourcos or eont;;imln:itlon tomo drinking w:itor. Envlronmootal eontlmln:itlofl Is 001 11k<:tly tooccur wh@n con!:iminMis ara usod .;ind m;'ln�od proPQr1y.

~~(1) Where mu!tlplo PQlel'lti:il conram!nant sourcos exist at :i sito, the highe�t level of l1sk !sused. (2} See Table 3 for d;:itabawlistings (If netf!ssary).~~

~~1/30/01 Pa()o Sora TABLE 2. INVENTORY RESULTS -LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA. CITY OF~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Rlsk Figure) Source Type Name location City Listing Areas Level (2) Potential Impacts Comments~~

26 Campgrounds/RV Parks Roaring River AJ. Roaring River junction Estacada Field· Within sensitive Moderate leaks or spU!s of automotive fluids or improperly campground • USFS with the rnainstem Observation area. managed septic systems and wastewater Clackamas Interview disposal may impact drinking water supply. Heavy usage along edge of waterbody may contribute to erosion, causing turbidity.

27 campgrounds/RV PaOc;s Sunstrip Immediately NW of Pup Estacada Field· Within sensitive Moderate Leaks or spills of automotive fluids or improperly Campground · USFS Creek junction w/ Observation area. managed septic systems and wastewater mainstem Clackamas Interview disposal may impact dr"1nking water supply. Heavy usage along edge of waterbody may contribute to erosion, causing turbidity.

28 Above Ground Storage Three Lynx- USFS & AfThree LynxCreek Estacada Fie!d- Within sensitive Moderate Spills. leaks, or improper h3nd!ing of stored Tanks · Excluding Water PGE employee junction with mainstem Observation area. materials may impact the drinking water supply. Not identified in database query. housing & work Clackamas Interview May be listed under a different complex name. Fueling area evident. no secondary containment

Housing - High Density (> Moderate Improper use, storage, and disposal of household 1 House/0.5 acres) chemicals may impact thedrinking water supply. Not identified in database query. Stormwater run--off or infiltration may carry May be listed under a different contaminants to drinking waler supply. name. Fueling area evident, no secondary containment.

29 Wastewater Treatment Indian Henry On the 4620 road near Estacada Field· Within sensitive Higher Improper management of wastewater. treatment Plants/Collection Stations Campground - USFS the mainstem Clackamas Observation area. chemicals, or equipment maintenance m3lerials Wastewater collection and llft Interview may impact drinking water supply. station routing to P01W at Timber Lake Job Corps Center.

Campgrounds/RV Parks Moderate Leaks or spms of autoinotlve fluids or lmproper1y managed septic systems andwastewater Wastewater collection and lift disposal may impact drinking water supply. station routing to POTW at Heavy usage along edge of waterbody may Timber Lake Job Corps Center. contribute to erosion. causing turbidity.

~~Nou:: Sites and ar1.i ara onty Potential sourcei; of contamination to the dl'1nklnG wlltcr. Envlrontn(lll� cont:imintitkm ls not llk~~

~~(1) Where multiple POtOntbl contaminant souroos elOd. (2} Soo Table 3 fQf d:;ii:ibasc.ijs1l1"19s (II necessary).~~

~~�--���- -�---��- 1130/01 Page 001 o TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA, CITY OF~~

~~Reference Potential Proxiniity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Figure) Source Type Name Location City Listing Areas Level (2) Potential Impacts Comments~~

30 Housing - High Density(> Timber Lake Job Af.Timber Lake, just Estacada Database Within senslt!ve Moderate Improper use, storage, and disposal of household 1 House/0.5 acres) Corps Center - USFS south of the 4630 road (2) Fie!d area. chemicals may impact the drinking water supply. Large work station and Job & other Federal Govt. Observation Stormwater run-off or infiltration may carry Corps training center. Interview contaminants to drinking water supply. Sewer Lines - Close Moderate !f not properly designed, installed. and Proximity to PWS maintained, sewer Jines can impact drinking large work station and Job water, especially adjacent to a waterbody or within Corps training center. the 2-year time-of-travel zone for drinking water wens. Schools Moderate Over-application or improper handling of cleaning products, pesticides or fertilizers used on the Large work station and Job school grounds may impact drinking water. Corps training center. Vehicle maintenance wastes may contribute contaminants. Machine Shops Higher SpiUs, leaks. or improper handling of SOivents, metals, and other chemicals or materials during Large work station and Job transportation. use. storage and disposal may Corps training center. impact the drinking water supply. Motor Pools Moderate SpU!s, leaks, or improper hand!!ng of fuels and other chemicals from vehicle service and parking Large work station and Job areas may impact the drinking water supply. Corps training center. Stormwater run-off or infiltration may carry contaminants to drinking water. Wastewater Treatment Higher Improper management of wastewater, treatment P!ants!Co!lection Stations chemicals, or equipment maintenance materials Large work station and Job may impact drinking water supply. Corps training center. Drinking Water Treatment Moderate Treatment chemicals and equipment Plants maintenance materials may impact groundwater Large work station and Job or surface water source. Corps training center. Above Ground Storage Moderate Spills, leaks, or Improper handling of stored Tanks - Excludlng Water materials maylmpact the drinking water supply. Large work station and Job Corps training center. Junk/Scrap/Salvage Yards Higher Spills. teaks, or improper handling of automotive chemicals, batteries, and other waste materials Large work station and Job during storage and disposal may impact the Corps training center. drinking water supply.

Note: Sit� and i:ir<1as ldentlllfXI Inthis Tat:lle a.reonly J)Otontl:it sourc&S or contaml03tlon to lhudr!nkll'lfJ waler. Envifonmont:JI conttimlnatlon Is not likely toOCCU' when · cont:imtn;;inu; are u�ed :w1'lmanaged ptoperly.

~~(1) Whore multlplc potentbl contaminant sourcos ai~~

~~1130/01 ?age 7 of 6 TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4100279 ESTACADA, CITY OF~~

Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Figure) Source Type Name Location City Listing Areas Level (2) Potential Impacts Comments 30 Pestlcide/Fertilizer/Petro!eu Timber Lake Job M.Timber Lake, ju;rt Estacada Database Within sensitive Higher Leaks, spills and Improper handling of pesticides, m Storage, Handling, Corps Center w USFS south of the 4630 road (2) Field� area. fertilizers and petroleum products may impact Large work station and Job Mixing, & Cleaning Areas & other Federal Govt. Obseivation drinking water source. Corps training center. Interview Apartments and Lower Improper use. storage, and disposal of hoaseho!d Condominiums and facility maintenance chemicals may impact Large work station and Job the drinking water supply. Stormwater run--offor Corps training center. infiltration may carry contaminants to water supply.

31 Campgrounds/RV Parks Alder Flat East side of mainstem, Estacada Field- Within sensitive Moderate Leaks or spills of automotive fluids or improperly campground - USFS just south of Timber lake ObseNation area. managed septic systems and wastewater Interview disposal may impact drinking water supply. Heavy usage along edge of waterbody may contribute to erosion. causing turbidity.

32 Pesticide/Fertmzer/Petroleu Ripplebrook Ranger 1mmed'1ately north of Estacada Database Within sensitive H'1gher Leaks, sp'ills and improper handling of pesticides. m S1orage, Handling, Station - USFS North Fork junction with (2) Field- area. fertilizers and petroleum products may impact Mixing, & Cleaning Areas mainstem ObseNallon drinking water source. lnteNiew Office Lower Spills, teaks, or improper handling of chemicals Buildings/Complexes and other materials stored and used in maintenance or from· parking areas may impact the drinking water supply. Above Ground Storage Moderate SplUs, leaks. or improper handling of stored Tanks - Excluding Water materials may impact the drinking water supply. Other Heliport serving Mt. Moderate The impacts of th!s potential contaminant source Hood NF sites will be addressed during the enhanced inventory.

33 Campgrounds/RV Parks Riverside Approx. 1 km north of Estacada Field- Within sensitive Moderate Leaks or spil!s of automotive fluids or improperly campground - USFS Collawash River junctln · Observation area. managed septic systems and wastewater with malnstem !nteNiew disposal may impact drinking water supply. Heavy usage along edge ofwaterbody may contribute to erosion, causing turbidity.

34 Campgrounds/RV Parks Riverford Ar.the junction of the Estacada Field� Within sensitive Moderate Leaks or spills of automotive fluids or improperly Campground - USFS mainstem and the Observation area. managed septic systems and wastewater Collawash River !nteNiew disposal may impact drinking water supply. Heavy usage along edge of waterbody may contribute to erosion. causing turbidity.

Not@: S�es :ind ar@as 1i;l11ntlfled Inthis T.:iblc are onty potontlal sourCllli of contamlfl:itkin to tho:i c!'1nkln(I wator. Envlronm11ntal contamination Is not likely tooccur when contaminants are usOO anclmanagad prop

~~{1) Whwe multlplc potllntla1 contaminant sOUl'C(IS exist at a sl!O, the highest level of risk Is used. (2) See T;it:ile 3 for i;latat:lasc !lstlni:is (If ne-ccss;iry).~~

~~1130/01 Paoe 8of8 TABLE 3. RESULTS OF REGULATORY DATABASE SEARCH~~

~~PWS# 4100279 ESTACADA, CITY OF~~

~~Reference No. (1) Name Database Listings (2)~~

1 Rocky's Furnitiure SFM - LACQUER GLOSS stored in CAN Stripping & Repair SFM - LACQUER THINNER stored in CAN SFM - MIRACLE COLD STRIPPER stored in PLASTIC OR NON-METALLIC DRUM SFM - PENETRATING STAIN stored in CAN SFM - SANDING SEALER stored in CAN SFM - SEMI GLOSS LACQUER stored in CAN

~~SFM - WASH THINNER stored in PLASTIC OR NON METALLIC DRUM~~

~~HWIMSY list with unknown generator or transporter status.~~

~~3 PGE Cazadero SFM - DIESEL FUEL stored in ABOVEGROUND TANK Hydroelectric PlanUDam SFM - LEAD ACID BATTERIES-WET stored in OTHER SFM - KEROSENE stored in STEEL DRUM~~

~~SFM - HYDRAULIC OIL 68 stored in STEEL DRUM~~

~~SFM - GREASE FM NLGI 1 stored in STEEL DRUM SFM - GREASE 2 stored in STEEL DRUM SFM - GASOLINE stored in UNDERGROUND TANK~~

~~SFM - GASOLINE stored in ABOVEGROUND TANK SFM - ELECTROLENE stored in STEEL DRUM SFM - DIESEL FUEL stored in TANK INSIDE BUILDING SFM - SOLVENT GW350 stored in STEEL DRUM~~

~~SFM - CHEVRON TURBINE OILS stored in STEEL DRUM HWIMSY list with unknown generator or transporter status.~~

~~SFM - DIESEL FUEL stored in UNDERGROUND TANK~~

Notes: (1) See Table 2 and Figure. (2) For State Fire Marshals (SFM) list, information on materials in a gaseous-form is not presented since gaseous compounds rarely pose a threat to groundwater or surface water.

~~1/30/01 Page 1 of 3 TABLE 3. RESULTS OF REGULATORY DATABASE SEARCH~~

~~PWS# 4100279 ESTACADA, CITY OF~~

Reference No. (1) Name Database Listings (2) 3 PGE Cazadero SFM - LUBRICATING OIL stored in STEEL DRUM Hydroelectric Plant/Dam SFM - TURBINE OIL stored in STEEL DRUM SFM - UNOCAL UNAX AW32 stored in STEEL DRUM

~~SFM - USED MOTOR OIL stored in STEEL DRUM SFM - USED OIL stored in STEEL DRUM .SFM - USED TURBINE OIL stored in STEEL DRUM UST list-PWS needs to verify tank permit status~~

~~SFM - NAPHTHA ELECTRIC CLEANER stored in STEEL DRUM~~

~~4 Estacada Mobile Village SIS list with a individual WPCF permit.~~

~~13 Promontory Park - PGE SIS list with a individual WPCF permit.~~

~~14 Silver Fox RV Park HWIMSY list with unknown generator or transporter status. SIS list with a individual WPCF permit.~~

~~17 City of Estacada, SFM - DIESEL FUEL stored in TANK INSIDE BUILDING Drinking Water Treatment Works SFM - CALCIUM HYPOCHLORITE SOLN stored in PLASTIC OR NON-METALLIC DRUM~~

~~18 Utility Station - Cascade SFM - LEAD ACID BATTERIES-WET stored in OTHER Utilities & Airtouch · Cellular~~

~~23 Lazy Bend UST list-PWS needs to verify tank permit status Campground - USFS~~

~~30 Timber Lake Job Corps HWIMSY list with unknown generator or transporter status. Center - USFS & other Federal Govt.~~

Notes: (1) See Table 2 and Figure. (2) For State Fire Marshals (SFM) list, information on materials In a gaseous-form Is not presented since gaseous compounds rarely pose a threat to groundwater or surface water.

~~1130101 Page 2 of 3 TABLE 3. RESULTS OF REGULATORY DATABASE SEARCH~~

~~PWS# 4100279 ESTACADA, CITY OF~~

Reference No. (1) Name Database Listings (2) 30 Timber Lake Job Corps LUST cleanup initiated on 9/10/98. PWS should verify Center - USFS & other cleanup progress. Federal Govt. LUST list with unknown status

~~SIS list with a individual NPDES permit. UST list-PWS needs to verifytank permit status~~

~~32 Ripplebrook Ranger UST list-PWS needs to verify tank permit status Station - USFS LUST list with unknown status~~

Notes: (1) See Table 2 and Figure. (2) For State Fire Marshals (SFM} list, Information on materials in a gaseous-form is not presented since gaseous compounds rarely pose a threat to groundwater or surface water.

~~1/30/01 Page 3 of 3~~

~~Figure 1: City of Estacada's Drinking Water Protection Area PWS 4100279~~

~~Drinking Water Intake - Surface Water~~

~~Drinking Water Protection Area~~

This assessment addresses Estacada'& drinking water protection area between E&tacada's intake and the upstream intake forUSFS Ripplebrook RSmmherfakc JCC. Information on the protection area upstream of the USFS intakft is presented In the SourceWaler Asaasr;ment forthe USFS Ripplchroak/Timberfake JCC (m�eattactunent B for a summary). l1\0inventory of potential contaminant sourcesdid not include the Upper Clackamas sub-basin (upstream of the mouth of the Collawash) and the Collawash PJversub-basin.

Note on Base Map: 1:100,000 scale U.S. Geological Survey Digital Raster Graphics (DRGs) for Oregon City (1982), North Santiam River (1983), Mount Hood (1983) and Madras (1983) are displayed. DRGs are scanned images of topographic sheets. Where the DRGs join, seams and/or gaps may be visible.Between DRGs, variations in information displayed also may be seen.

~~0 2 3 4 5 6~~

~~Printed January, 2001 Oregon Department of Environmental Quality GIS Sensitive Areas in Watershed Figure 2: Sensitive Areas within City of Estacada's Drinking Water Protection Area PWS 4100279~~

~~Drinking Water Intake - Surface Water~~

Drinking Water Protection Area Sources of Information: (Clackamas County Areal High Soil Erodibility: Defined by slopes greater than 30 percent and K factor greater than .25. Soils derived from 1:24,000, USDA, NRCS, SSURGO certified data. Slope is in the SSURGO database Component Ta ble. Slope displayed is a weighted average of the average slope forthe map unit. K factor is contained in the SSURGO Layer Ta ble. K factor displayed is a weighted average(of only the surface layer) for the map unit. High Runoff Po tential: Hydrologic Group D (very slow infiltration rates) from the SSURGO Component Ta ble. SSURGO data have been certified. (Mt. Hood National Forest) High Soil Erodibility: Defined by high sedimentation yield potential of the dominant soil. High Runoff Potential: Hydrologic Group D in the dominant soil. These data are extracted from the Soil Resource Inventory. (Entire Watershed) High Permeability Soils: Alluvial deposits (Oal) from the U.S. Geological Survey Geologic Map of Oregon GIS layer. Sensitive Area Setbacks Adjacent to Streams and Reservoirs: 1000 foot buffer from the centerline of perennial streams and the shoreline of any reservoir.

Note on Sensitive Areas: In determining the most sensitive areas within this Drinking Water Protection Area, DEQ used existing GIS layers and other natural resource agency data sets. Not all areas of the state have been mapped for the natural resource parameters of interest or at the level of detail ideal for this type of analysis. DEQ has sought to obtain the best available information for this composite. Kilometen; l!l:l1I� Printed January, 2001 0 10 20 �·- GIS = Oregon Departnu'lnt of Environmental Quality -

0 10 Miles Figure 3a: Source Water Assessment Results City of Estacada's Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources PWS 4100279 Drinking Water • Intake - Surface Water

~~Drinking Water Protection Area~~

~~Sensitive Areas~~

~~.A. . Area Feature (see Note 2) + Point Feature (see Note 2)~~

~~Notes on Potential Contaminant Sources~~

Note 1: Sites and areas noted in this Figure are potential sources of contamination to the drinking water identified by Oregon drinking water protection staff. Environmental contamination is not likely to occur when contaminants are handled and used properly or when best management practices are employed.

Note 2: Feature identification numbers correspond to the potential contaminant source numbers in Ta ble 2. The area features represent the approximate area where the land use or activity occurs and is marked at the point closest to the intake. The point features represent the approximate point where the land use or activity occurs.

This assessment addresses Estacada's d.rinking water protection area between Estacada's intake and the upstream intake for USFS Ripplebrook RS/Timberlake JCC: Information on the protection area upstream of the USFS intake is presented in the Source Wa ter Assessment for the USFS Ripplebrook/Timberlake JCC (see attachment 8 for a summary).

~~The inventory of potential contaminant sources did not include the Upper Clackamas sub-basin (upstream of the mouth of the Collawash) and the Collawash River sub-basin.~~

� r� l!ll!.1 ""'""""' -· MJ., """""'""' I Printed January, 2001 ...... Oregon Department of Environmental Quality GIS Figure 3b: Source Water Assessment Results (Inset) City of Estacada's Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources PWS 4100279 Drinking Water • Intake - Surface Water

~~Drinking Water Protection Area~~

~~Sensitive Areas~~

~~A Area Feature (see Note 2) + Point Feature (see Note 2)~~

~~Notes on Potential Contaminant Sources~~

This assessment addresses Estacada's drinking water protection area between Estacada's intake and the upstream intake for USFS Ripplebrook RSmmberlake JCC Information on the protection area upstream of the USFS intake is presented in the Source Water Assessment forthe USFS Ripplebrookmmberlake JCC (see attachment 8 for a summary).

~~The inventory of potential contaminant sources did not include the Upper Clackamas sub-basin (upstream of the mouth of the Collawashl and the Collawash River sub-basin.~~

~~Ki'lome�r1 0 1 2 � 0~~

~~-· Mies """""""'' Printed January, 2001 "'"'" _Oregon Department af Environmental Quality GIS Attachment B. Summary of Source Water Assessment Results for Upstream Intakes~~

~~US Forest Service Timberlake JCC (PWS #4101093)~~

~~Executive Summary~~

Figure 1. USFS Timberlake JCC Drinking Water Protection Area Figure 2. Sensitive Areas within USFS Timberlake JCC's Drinking Water Protection Area Figure 3. Source Water Assessment Results - USFS Timberlake JCC's Drinking Water Protection Area with Sensitive Areas and Potential Contamination Sources

Table 1. Summary of Potential Contaminant Sources by Land Use Table 2. Inventory Results- List of Potential Contaminant Sources I I I I I I I I I I I I I I I I I I I I I I I I I I Executive Summary The dr inking water for U.S. Forest Service Timberlake JCC (T imberlake JCC) is supplied by an intake on Han-iet Lake. This public water system serves approximately 450 citizens. The intake is located in the Oak Grove Fork Clackamas River Watershed in th e Clackamas Sub Basin of the Willamette Basin. In addition, Timberlake JCC us es a groundwater spring for dr inking water supply. This Source Water Assessment addresses only the surfacewater component of Timberlake JCC's drinking water supply and the groundwater supply will be addressed in a separate report.

There are five drinking water intakes on the Cla.ckamas River downstream of Timberlake JCC's intake including the intakes for the City of Estacada, Clackamas River Water, North Clackamas County Water Commission, South Fork Water Board, and Lake Oswego Municipal Water. Activities and impacts in the Timberlake JCC drinking water protection area have th e potential to also impact downstream users.

The geographic area providing water to Timberlake JCC's intake (the drinking water protection area) extends upstream approximately 128 miles in an easterly direction and enc ompasses a total area of 13 1 square miles. Included in this area are a number of tributaries to the main stem, including Kink, Peavine, Cot, Shellrock, Buck, Stone, Anvil and Dinger Creeks and Timothy Lake and its tr ibutaries. The protection area with in an 8-hour travel time from the intake extends approximately 8.6 miles upstream of th e HaITiet Lake intake. It is recommended the Timberlake JCC water system and community consider increased protection within an 8-hour travel time from the intake since eight hours should provide adequate response time to protect the integrity of th e public water system intake after a spill or release at any crossing or discharge point to the stream. The intake is located at an approximate elevation of 2,035 feet and the upper edge of th e watershed is located at an elevation of approximately 5,600 feet at Mt. Wilson.

An inventory of potential contamination sources fo r the surface water source was performed within Timberlake JCC's drinking water protection area. The primary intent of th is inventory was to identify and locatesignificant po tential sources of contaminants of concern. The inventory was conduc ted by reviewing applicable state and federal regulatory databases and land use maps, interviewing persons knowledgeable of the area, and conducting a windshield survey by driving through the dr inking water protection area to fieldlocate and ver ify as many of the potential contaminant source activities as possible. The primary contaminants of conc ern for surface water intakes are sediments/turbidity, microbiological, and nutrients. It is important to remember that the sites and areas identifiedare only potential sources of contamination to the drinking water, and water quality impacts are not likely to occur when contaminants are used and managed properly.

The delineated drinking water protection area for the surfacewa ter source is primarily dominated by forestry land uses. A total of twelve potential contamination sources were identified within Timberlake JCC's drinking water protection area. All of th os e are located in the sens itive areas. The potential contaminant sources identified in th e watershed include gravel pits, five campgrounds, Timothy Lake high use recreation area, a hydroelectric plant, a horse camp, clear cuts, transmission lines, and road crossings. The potential contaminant sources within the drinking water protection area all pose a relatively higher to moderate risk to the drinking water supply. In addition, a campground, two cinnabar mines, th e Lake Han-iet Dam, and landslides were identifiedas potential sources of contamination located outside of the drinking water protection area. These potential sources are included in the inventory because

Oregon Source Water Assessment Report U.S. Forest Service Timberlake JCC - PWS # 4101093 they may impact downstream water users. This provides a quick look at the existing potential sources of contamination that could, if improperly managed or released, impact the water quality in the \Vatershed.

The susceptibility analysis combines the results of the locations of the potential contaminant sources with the locations of the sensitive areas. Overlaying the locations of the moderate- to high-risk sources within the sensitive ar eas provides an indication of the areas that are highly susceptible to contamination. In the Timberlake JCC watershed, the results of the susceptibility "analysis" include the distribution of 12 ident ified high- to moderate-risk sources within the areas of highly permeable soils, high erosional soils, high rnnoff potential soils, and within the l 000' setback from the streams. The susceptibility analysis provides the community and the public water system with information on where the greatest risk occurs and where to focus resources forprotection.

~~2 Oregon Source Water Assessment Report U.S. Forest Service Timberlake JCC -PWS # 4101093 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE~~

PWS # 4101093 USFS TIMBERLAKE JGC Residential/Municipal Land Uses Relative Total in Potential Contamination Source Note Risk Level DWPA Airport - Maintenance/Fueling.Area Higher 0 Apartments and Condominiums Lower 0 Campgrounds/RV Parks (1) Moderate 5 Cemeteries - Pre-1945 Moderate 0 Drinking Water Treatment Plants Moderate 0 Fire Station Lower 0 Fire Training Facilities Moderate 0 Golf Courses Moderate 0 ,---��-c-- -c-cc-�- c��.,---��- H o using - High Density {> 1 House/0.5 acres) Moderate 0 Landfill/Dumps (1) Higher 0 Lawn Care - Highly Maintained Areas Moderate 0 ·� Motor Pools Moderate 0 Parks Moderate 0 Railroad Yards/Maintenance/Fueling Areas Higher 0 Schools Lower 0 Septic Systems - High Density ( > 1 system/acre) (1) Higher 0 Sewer Lines - Close Proximity to PWS (1) Higher 0 Utility Stations - Maintenance Transformer Storage Higher 0 Waste Transfer/Recycling Stations (1) Moderate 0 Wastewater Treatment Plants/Collection Stations (1) Moderate 0 Other 0

NOTES: Sites and areas Identified In this Table are only potential sources of contamination to the drinking \Va ler. Environmental contamination is not Hkely to occur when contaminants are used and managed properly. (1) - Potential source of microbial contamination (2} - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray Irrigation (3) - For groundwater public water systems, septic systems located within the 2-year time-of-travel (TOT) are considered moderate risks.

~~12110/2002 Page 1 of 4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE~~

PWS # 4101093 USFS TIMBERLAKE JGC Commercial/Industrial Land Uses Relative Total in Potential Contamination Source Note Risk Level DWPA Automobiles - Body Shops Higher 0 Automobiles - Car Washes Moderate 0 Automobiles - Gas Stations Higher 0 Automobiles - Repair Shops Higher 0 Boat Services/Repair/Refinishing Higher 0 CemenUConcrete Plants Moderate 0 Chemical/Petroleum Processing/Storage Higher 0 Dry Cleaners Higher 0 Electrical/Electronic Manufacturing Higher 0 FleeUTrucking/Bus Terminals Higher 0 Food Processing Moderate 0 Furniture/Lumber/Parts Stores Moderate 0 Home Manufacturing Higher 0 Junk/Scrap/Salvage Yards Higher 0 Machine Shops Higher 0 ' MedicalNet Offices (1) Moderate 0 i Metal Plating/Finishing/Fabrication Higher 0 Mines/Gravel Pits Higher 3 Office Buildings/Complexes Lower 0 Parking Lots/Malls (> 50 Spaces) Higher 0 Photo Processing/Printing Higher 0 Plastics/Synthetics Producer Higher 0 Research Laboratories Higher 0 RV/Mini Storage Lower 0 Wood Preserving/Treating Higher 0 Wood/Pulp/Paper Processing and Mills Higher 0 Other: Moderate 1

NOTES: Sites and areas Identified in this Table are only potential sources of contamination to the drinking \Vater. Environmental contamination is not likely to occur when contaminants are used and managed properly. {1) - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - For groundwater public water systems, septic systems located within the 2-year lime-of-travel (TOT) are considered moderate risks.

~~1211012002 Page 2 of 4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LAND USE~~

PWS # 4101093 USFS TIMBERLAKE JCC Agricultural/Forest Land Uses Relative Total in Potential Contamination Source Note Risk Level DWPA Auction Lots (1) Higher 0 Boarding Stables (1) Moderate 0 Confined Animal Feeding Operations (CAFOs) (1) Higher 0 Crops - Irrigated (inc. orchards, vineyards, nurseries, greenhouses) (2) Moderate 0 Crops - Nonirrigated (inc. Christmas trees, grains, grass seed,. pasture) Lower 0 Farm Machinery Repair Higher 0 Grazing Animals (> 5 large animals or equivalent/acre) (1) Moderate 0 Lagoons/Liquid Wastes (1) Higher 0 Land Application Sites (1) Moderate 0 Managed Forest Land - Broadcast Fertilized Areas Lower 0 Managed Forest Land - Clearcut Harvest (< 35 yrs.) Higher Managed Forest Land - Partial Harvest (< 10 yrs.) Moderate 0 Managed Forest Land - Road Density ( > 2 mi./sq. mi.) Moderate 0

~~Pesticide/Fertilizer/Petroleum Storage, Handling, Mixing, & Cleaning Ar Higher 0 Recent Burn Area·s (< 10 yrs.) Lower 0 Managed Forest Lands - Status Unknown Moderate 0 Other: Moderate 1~~

NOTES: Sites and areas Identified in this Table are only potential sources of conlaminatlon to the drinking water. EnvirOnmental contamination is not likely to occur when contaminants are used and managed properly. (1} - Potential source of microbial contaminalion (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - For groundWater publ!c water systems, septic systems located within the 2-year time-of-travel (TOT) are considered moderate risks.

~~12/10/2002 Page 3 of 4 TABLE 1. SUMMARY OF POTENTIAL CONTAMINANT SOURCES BY LANQ USE~~

~~PWS # 4101093 USFS TIMBERLAKE JGC Miscellaneous Land Uses Relative Total In Potential Contamination Source Note Risk Level DWPA Above Ground Storage Tanks · Excluding Water Moderate 0~~

Channel Alterations • Heavy Lower 0 Combined Sewer Outfalls (1) Lower 0 Stormwater Outfalls (1) Lower 0 Composting Facilities (1) Moderate 0 Historic Gas Stations Higher 0 Historic Waste Dumps/Landfills (1) Higher 0

~~Homesteads • Rural • Machine Shops/Equipment Maintenance Higher 0 Homesteads · Rural · Septic Systems {< 1/acre) (1)(3) Lower 0~~

~~Injection/Dry Wells, Sumps • Class V UICs (1) Higher 0 Kennels {> 20 Pens) (1) Lower 0 Military Installations Higher 0 Random Dump Sites Moderate 0~~

~~River Recreation • Heavy Use (inc. campgrounds) (1) Moderate 2 Sludge Disposal Areas (1) Moderate 0 - Stormwater Retention Basins (1) Moderate 0~~

~~Transmission Lines • Right-of-Ways Higher 1~~

~~Transportation • Freeways/State Highways/Other Heavy Use Roads Moderate 0~~

~~Transportation • Railroads Moderate 0~~

~~Transportation • Right-Of-Ways • Herbicide Use Areas Moderate 0~~

~~Transportation • River Traffic • Heavy Lower 0~~

~~Transportation • Stream Crossing - Perennial Higher 1~~

UST · Confirmed Leaking Tanks • DEQ List Higher 0 UST · Decommissioned/Inactive Lower 0 UST · Nonregulated Tanks {< 1,100 gals or Large Heating Oil Tanks) ·Higher 0 UST · Not Upgraded and/or Registered Tanks Higher 0

UST • Upgraded/Registered • Active Lower 0 UST · Status Unknown Higher 0 Upstream Reservoirs/Dams Moderate 1 Wells/Abandoned Wells Higher 0 Large Capacity Septic Systems (serves > 20 people) · Class V UICs (1) Higher 0 Construction/Demolition Areas Moderate 0 Other: Lower 1

NOTES: Sites and areas Identified in this Table are only potential sources of contamination to the drinking water. Environmental contamination is not llkely to occur when contaminants are used and managed properly. (1) - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered loi,ver risk than spray Irrigation (3) - For groundwater public water systems, septic systems located within the 2-year time-of-travel (TOT} are considered moderate risks.

~~12110/2002 Page 4 of 4 TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4101093 US.FS TIMBERLAKE JCC~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Rlsk Level Figure) Source Type Name Location City Listing Areas (1) Potential Impacts Comments~~

Mines/Gravel Pits Nisbet Mine South bank of Oak Grove Interview Just outside Lower Spills, leaks, or improper handling of Abandoned cinnabar mine. The · Fork 1/3 mile below OWPA for chemicals and wastes generated in mining Ames �Bancroft mine is also Kiggens Mine Harriet Lake operations or from heavy equipment may nearby, but fartherfrom the (Pipeline) impact the drinking water Supply. stream. Risk reduced to Lower because potential source is outside of the DWPA but may impact downstream water users.

2 Mines/Grave! Pits Kiggins Mine South bank of Oak Grove Interview Just outside Lower Spills, leaks, or improper handling of Abandoned cinnabar mine. Fork below Lake Harriet DWPA for chemicals·andwastes generated in mining Located a X mi!e downstream Harriet Lake operations or from heavy equipment may from Lake Hcirriet dam. The (Pipeline) impact the drinking water supply. Kiggins mine site lies within 300 ft.of the Oak Grove Fork of the Clackamas on the South bank. The mine was developed in 1923, and is no longer used. Risk reduced to Lower because potential source is outside of the DWPA but may impact dov.mstream water users

3 Upstream Lake Harriet Dam Lake Harriet Fleld Just outside Lower During major storm events, reservoirs· may Risk reduced to Lower because Reservoirs/Dams Observation DWPA for contribute to prolonged turbidity for potential source is outside of the Harriet Lake downstream intakesfor drinking water. DWPA but may impact (Pipeline) Construction, fluctuating water levels, and downstream water users. heavy wa.terside use can increase erosion and turbidityin reservoir/drinking water source.

4 River Recreation - Ripplebrook Ripp!ebrook Rd. Fie!d Just outside Lower Inadequate disposal of humaO wastes may Risk reduced to Lower because Heavy Use (inc. Campground Observation DWPA for contribute bacteria and nutrients to the potential source is outside of the campgrounds) Harriet Lake drinking water supply. Heavy use may DWPA but may impact Ripplebrook (Pipeline) contribute to streambank erosion causing downstream water users Campground turbidity. Fuel spil!s and emissions may also contribute to contamination.

Note: Sites and areas Identified in this Table are only potential sources of contamination tothe drinking water. Environmental contamination is not likely to occurwhen contaminants are used and managed properly.

~~(1) WheremUltiple potential cont:iminrmt sources exist ata Ste, the highest level ofrisk Is used.~~

~~(2) See Table 3 for database !!stings (if necessary).~~

~~1211012002 Page 1 of4 TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4101093 USFS TIMBERLAKE JCC~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Level Figure) Source Type Name Location City Listing Areas (1) Potential Impacts Comments~~

5 Other Landslides oOwnstream from Lake Interview Just outside Lower The impacts of this potential contaminant Harriet DWPAfor source will be addressed during the Potential source is outside of the Harriet Lake enhanced inventory. OWPA but may impact (Pipeline). downstream water users.

6 Campgrounds/RV Lake Harriet Lake Harriet Within Moderate Leaks or spills of automotive fluids or Parks Campground sensitive improperty managed septic systems and area. for wastewater dispcsal may impact drinking Harriet Lake water supply. Heavy usage along edge of (Pipeline) waterbody may contribute to erosion, causing turbidity.

7 Managed Forest Clearcuts Throughout DWPA Freid- Within Higher Cutting and yarding of trees may contribute to Land -Clearcut Observation sensitive increased erosion, resulting in turbidity and Harvest (<: 35 yrs.) area. for chemical changes in drinking water supply. Harriet Lake Over-application or improper handling of (Pipeline) pesticides or fertilizers may impact drinking water source.

8 Mines/Gravel Pits Gravel Throughout OWPA Field- Within Higher Spills, leaks, or improper handling of Pits/Quarries Observation sensitive chemicals and wastes generated in mining area. for operations or from heavy equipment may Harriet Lake impact the drinking water supply. (Pipeline)

9 Campgrounds/RV SheUrock Creek Within Moderate Leaks or spills of automotive fluids or Parks Campground sensitive improperly managed septic systems and No visual observation of site - area. for wastewater disposal may impact drinking . site location is based on map. Harriet Lake water supply. Heavy usage along edge of (Pipeline) waterbody may contribute to erosion, causing turbidity.

Note: Sites and areas klentlfied In this Table are onty potential sources of contamination to the drlnklng water. Environmental contaminritlon Js not likely to occur when contaminants are used and managed property. _ (1) Where multiple potential contaminant sOurces exist at a site, the highest level ofrisk !s used.

~~(2) See Table 3 for dabbose listings (if necessary).~~

~~12/10/2002 Page 2 of4 TABLE 2. INVENTORY RESULTS -LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4101093 USFS TIMBERLAKE JCC~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Level Figure) Source Type Name Location City Listing Areas (1) Potential Impacts Comments~~

10 Other Stony Creek Field- Within Moderate Spills, leaks. or improper handling of Hydroelectric Plant Observation 'sensitive chemlcals and other materials during area. for transportation, use, storage, and disposal Harriet Lake may impact the drinking water supply. (Pipeline)

11 Campgrounds/RV Hideaway Lake Within Moderate Leaks or spills of automotive fluids or Parks Campground sensitive improperly managed septic systems and No visual observation of site - area. for wastewater disposal may impact drinking site location is based on map. Harriet Lake water supply. Heavy usage along edge of (Pipeline) waterbody may contribute to erosion, causing turbidity.

12 Campgrounds/RV High Rock Creek Within Moderate Leaks or spills of automotive fluids or Parks Springs sensitive improperty managed septic systems and No visual obseNation of site - Campground area. for wastewater disposal may impact drinking site location is based on map. Harriet Lake water supply. Heavy usage along edge of {Pipeline) waterbody may contribute to erosion, causing turbidity.

13 Campgrounds/RV Summit lake Within Moderate Leaks or spills of automotive fluids or Parks Campground sensitive improperly managed septic systems and No visual observation of site - area. for wastewater disposal may impact drinking site location ls based on map. Harriet Lake water supply. Heavy usage along edge of (Pipeline) waterbody may contribute to erosion, causing turbidity.

14 River Recreation - Timothy Lake Timothy Lake Field- Within Moderate Inadequate disposal of human wastes may Heavy Use {inc. Observation sensitive contribute bacteria and nutrients to the Reservoir and six campgrounds. campgrounds) area. for drinking water supply. Heavy use may High recreation use area. Harriet Lake contribute to streambank erosion causing (Pipeline) turbidity. Fue! spills and emissions may also contribute to contamination.

Note: Sites and areas !dentlfieO In this Table are only potentra! sources ofcontamination to the drinking water. Environmental cof.taminatlon Is not Ukety to occur when cont:iminants are used and managed Properly. (1) Where multi pie potentr::il contaminant sources exist at a site, the highest !eve! of risk is used.

~~(2) See Tab!e 3 for database listings (Jf necessary).~~

~~1211012002 Page 3 of 4 TABLE 2. INVENTORY RESULTS - LIST OF POTENTIAL CONTAMINANT SOURCES~~

~~PWS# 4101093 USFS TIMBERLAKEJCC~~

~~Reference Potential Proximity to Relative No. (See Contaminant Approximate Method for Sensitive Risk Level Figure) Source Type Name Location City Listing Areas (1) Potential Impacts Comments~~

15 Transportation - Road Crossings Throughout OWPA Field- Within Higher Road building, maintenance & use may Stream Crossing - Observation sensitive & increase erosion slope failure causing USFS Mt Hood National Forest's Perennial area. for turbidity. Vehicle use increases the risk of ., Oak Grove Watershed Analysis Harriet Lake leaks or spills of fuel & other chemicals. Over- indicates there are 564 stream (Pipeline) application/improper handling of pesticides in crossings in the Lake Harriet and rightwQf-way may also impact water. Timothy Lake Watersheds. Road density is approximately 0.9 mi/sq m·1.

16 Other Joe Graham Field- Within Moderate The impads of this potential contaminant Horse Camp Observation sensitive source wil! beaddressed during the area. for enhanced inventoiy. Harriet Lake (Pipeline)

17 Transmission Transmission Field- Within Higher Construction and corridor maintenance may Lines - Right-of- Lines Observation sensitive contribute to increased erosion and turbidity Ways area. for in drinking water supply. Over-:application or Harriet Lake improper handling of pesticides or fertilizers {Pipeline) may impact drinking water supply.

Note: Sites and areas identified Jn this Table are onlypotential sources of contamination to the drinking water. Envlronmentnl contamination Is not !!kety to occur when contaminants are used and managed properly.

~~(1} Where multiple potential contaminant sources exist at a site, the highest lever of risk ls used.~~

~~(2) See Table 3 for database l!st!ngs (if necessary).~~

~~12/1 012002 Page 4 of 4 Figure 1: USFS Timberlake JCC's Drinking Water Protection Area~~

~~PWS 4101093~~

~~Drinking Water Intake - Surface Water~~

~~Drinking Water Protection Area~~

For watersheds with more than one intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next intake upstream. Ali protection areas for intakes upstream of the water system's intake are included In the USFS Ripplebrook Ranger Station's drinking water protection area. Activities and impacts in the USFS RipplebrookRanger Station's drinking water protection area also have the potential to impact downstream water users. See Attachment B for a schematic of upstream and downstream water providers in the Clackamas Sub-Basin.

Note on Base Map: 1:24,000 scale U.S. Geological Survey Digital Raster Graphics (DRGs) for Wolf Pk (19B5), Wapinitia Pass (1985), High Rock (1985), Mt Wilson (1985), Timothy Lake (1985), and Mt Mitchell (1985) are displayed. DRGs are scanned images of topographic sheets. Where the DRGs join, seams and/or gaps may be visible. Between DRGs, variations in Information displayed also may be seen.

~~Klfometere 0 1 2 3 4~~

•...ill ,,i.,.1:n'."1·:1," , ,, .jt... l,.:··w I 0 ' Mlee Printed Novembsr, 2002 Oregon Department of Environmental Qualfty GJS Sensitive Areas in Watershed Figure 2: Sensitive Areas with in the USFS Timberlake JCC's High Soil Erosion Potential {Slope > = 30 Percent and Soil Erodibility Factor > High Permeability Soils {Alluvial Deposits) Drinking Water Protection Area =.25) PWS 4101093 e Drinking Water Intake - Surface Water

Drinking Water Protection Area Sources of Information: {STATS GO) 30 High Soil Erodibility: Defined by slopes greater than percent and K factor greater than .25. Soils derived from 1:250,000 STATSGO data. Slope is in the STATSGO database Component Ta ble. Slope displayed is a weighted average of the average slope for the map unit. K factor is contained in the STATSGO Layer Ta ble. K factor displayed is a weighted average (of only the surface layer) for the map unit. High Runoff Potential: Hydrology Group D (very slow infiltration rates) from the STATSGO Component table. High Permeablllty Soils: Alluvial deposits {Qal) from the U.S. Geological Survey Geologic Map of Oregon GIS layer. (Mt. Hood National Forestl High Soll Erodibllity: Defined by high sedimentation yield potential of the dominant soil. High Runoff Potential: Hydrologlc Group Din the dominant soil. These data are extracted from the Soil Resource Inventory. {Entire Wa tershed) High Permeability Soils: Alluvial deposits (Qal) from the U.S. Geological Survey Geologic Map of Oregon GIS layer. Sensitive Area Setbacks Adjacent to Streams and Reservoirs: 1000 foot buffer from the centerline of perennial streams and the shoreline of any reservoir. . Note on Sensitive Areas: In determining the most sensitive areas within this Drinking Water Protection Area, DEQ used existing GIS layers and other natural resource agency data sets. Not all areas of the state have been mapped for the natural resource parameters of interest or at the level of detail ideal for this type of analysis. DEQ has sought to obtain the best available information for this composite. Kllometert ·� 0 10 ml!] Prlntod Ootober, 2002 Oregon Department of Environmental Quality OJS e-

~~Composite of Sensitive Areas High Runoff Potential (Hydrologic Group D - slow Infiltration rates) 0 234567~~

Mlle1 Figure 3: Source Water Assessment Results USFS Timberlake JCC's Drinking Water Protect ion Area with Sensitive Areas and Potent ial Contamination Sources PWS 4101093 • Drinking Water Intake • Surface Water

~~Drinking Water Protection Area~~

~~Sensitive Areas~~

~~A Area Feature (see Note 2) + Point Feature (see Note 2)~~

~~Notes on Potential Contaminant Sources~~

Note 2: Feature identification numbers correspond to the potential contaminant source numbers in Ta ble 2. The area features represent the approximate area where the land use or activity occurs and is marked at the point closest to the Intake. The point features represent the approximate point where the land use or activity occurs.

For watersheds with more than one intake, Oregon completes the assessments by segment and each source water assessment represents the area from the public water system's intake to the next Intake upstream. All protection areas for intakes upstream of the water system's Intake are Included In the USFS Ripplebrook Ranger Station's drinking water protection area. Activities and impacts in the USFS RipplebrookRanger Station's drinking water protection area also have the potential to impact downstream water users. See Attachment B for a schematic of upstream and downstream water providers In the Clackamas Sub-Basin.

~~Kllormtera~~

~~0 2 Mle1 Printed November, 2002 Oregon Department of Environmental Quality OIS CD Contents~~

~~Source Water Assessment Report Oregon City - South Fork Water Board, PWS # 4100591 North Clackamas County Water Commission, PWS # 4100580 and Clackamas River Water, PWS # 4100187~~

File Name Format Contents Clackamas_PCS_ Summaiy.xls Excel Excel version of the inventory results. 2002 Both a "Key to Terms" and "Invento1y Data" worksheet are included. Includes spatial coordinates in both Oregon Geographic Information Council (OGIC) and Universal Transverse Mercator (UTM) projection systems. pws00591-00580-00187 Word Summary brochure Text (Attachment A) SurnBroc.doc 2002 pws00591-00580-00187 SWA Word Report text Report.doc 2002 Table 1 - PCSs by Land Word Table 1. Summary of Potential Use.doc 2002 Contaminant Sources by Land Use Table 2 - PCSs and Impacts.doc Word Table 2. Possible Water Quality Impacts 2002 from Potential Contaminant Sources Table 3A - SFWB PCSs.doc Word Table 3. Invent01y Results - List of 2002 Potential Contaminant Sources for area between OC-SFWB intake and upstream intake for NCCWC. Table 3B - NCCWC PCSs.doc Word Table 3. Inventory Results - List of 2002 Potential Contaminant Sources for area between NCCWC intake and upstream intake for CRW. Table 3C - CRW PCSs.doc Word Table 3. Inventory Results - List of 2002 Potential Contaminant Sources for area upstream of the CRW intake. Table 4 - Coordinates.doc Word Table 4. Spatial Coordinates of Potential 2002 Contaminant Sources Assessment Report Electronic Files Oregon City - South Fork Water Board January9, 2003 PWS # 4100591 North Clackamas Co. Water Commission PWS # 4100580 and

~~Clackamas River Water PWS # 4100187~~

~~$\;lli>ol°"P' -· "'·- - Water Quality DMslon Drinking Water Protection Program~~

~~Source Water Assessment Report Electronic Files Oregon City - South Fork Water Board January9, 2003 PWS # 4100591 North Clackamas Co. Water Commission PWS # 4100580 and~~

~~Clackamas River Water PWS # 4100187~~

~~�CJ!0-'9"1 -· """""""' - Water Quality Division Drinking Waler Proleciion Program~~